Tungsten Film

Tungsten Film

What is tungsten film?

Tungsten films photographic designed to accurately represent colors as perceived by humans under tungsten light; the more usual color films are "daylight films", balanced to produce accurate colors under direct light from the sun or electronic flash. Tungsten film was developed for photographers who use tungsten lights, also known as photofloods, which have a much lower color temperature than daylight, at 3200 Kelvin. It also renders colors more accurately than daylight film under ordinary household incandescent lighting "day for night" effect, whereby film shot during the daytime looks as if it had been shot at night.

Tungsten film is designed to provide accurate exposure as well as color rendition even when exposed according to exposure meter readings indicating a long exposure; tungsten film can be used to avoid reciprocity failure which often occurs when using long exposures. Common film speeds for tungsten-balanced slide film are ISO 64, 160, and 320.

Tungsten Alloy Film Abstract

Provided herein is a CVD method and apparatus for the deposition of tungsten in which formation of tungsten film material is suppressed at the peripheral edge of the semiconductor substrate. In accordance with the invention, a halogenide purge gas is supplied to the peripheral edge of the processing face of a semiconductor wafer during the chemical vapor deposition of tungsten. The halogenide purge gases interact with the processing gases and form a passivation tungsten alloy film at the peripheral edge of the semiconductor wafer which suppresses or prevents the formation of a tungsten alloy film of tungsten material on the edge surface. Consequently, CMP can be applied to the tungsten alloy film semiconductor wafer, and particles of the tungsten alloy film material, etc., are not generated from the intense polishing of the peripheral edge of the wafer. Therefore, an uncontaminated tungsten-coated semiconductor wafer with a precise multilayer electrode wiring structure can be manufactured in large volume and favorable yields.

With the production of the Fuji chrome T64 coming to a stop, many people worry about the future of tungsten alloy film. Well, don't worry because Logography now has tungsten film! Read more after the break.

Tungsten alloy film has been a long time favorite for night photography as the low ISO makes it good for long exposures. It also balances out the yellow/orange color that we usually get from street lights and generally gives a cooler tone.

A few months ago, Fujifilm made a few announcements regarding the future of their film line. Last April, they have ceased the production of the duplicating film, Fuji chrome CDU II and in July, they discontinued the Fuji chrome T64 tungsten alloy film. The reason behind the decision was that sales for duplicating films have been declining over the years and the sales of T64 tungsten alloy film has dropped off as well. They have decided to focus on the more popular line in the pro film range and continue to sell the discontinued films while supplies last.

Suppression of tungsten alloy film deposition on a semiconductor wafer bevel edge with a halogenated purge gas.

Tungsten Alloy Environment

Tungsten Alloy Environment

Tungsten is a metal with many industrial and military applications, including manufacturing of commercial and military ammunition. Despite its widespread use, the potential environmental effects of tungsten are essentially unknown. Tungsten alloy environment is a hot topic for environment protection. This study addresses environmental effects of particulate and soluble forms of tungsten, and to a minor extent certain tungsten alloy components, present in some munitions formulations. Dissolution of tungsten powder significantly acidifies soils. Tungsten powder mixed with soils at rates higher than 1% on a mass basis, trigger changes in soil microbial communities resulting in the death of a substantial portion of the bacterial component and an increase of the fungal biomass. It also induces the death of red worms and plants. These effects appear to be related with the soil acidification occurring during tungsten dissolution. Dissolved tungsten species significantly decrease microbial yields by as much as 38% for a tungsten media concentration of 89 mg l-1. Soluble tungsten concentrations as low as 10-5 mg l-1, cause a decrease in biomass production by 8% which is possibly related to production of stress proteins. Plants and worms take up tungsten ions from soil in significant amounts while an enrichment of tungsten in the plant photosphere is observed. These results provide an indication that tungsten compounds may be introduced into the food chain and suggest the possibility of development of photo remediation-based technologies for the cleanup of tungsten contaminated sites.

Very little tungsten has been detected in the dew soils that have been analyzed for it, although around an ore-procession plant in Russia levels as high as 2000 ppm was found. The concentration of the element in natural waters is very low.

There are several minerals of tungsten; the most important are sheltie and wolfram. The main mining area is China, which today accounts for more than two-thirds of the world's supply. Other places with active tungsten mines are Russia, Austria, Bolivia, Peru and Portugal. World production is around 40.000 tons per year and reserves are estimated to be around 5 million tones. Tungsten is also recycled and it meets 30% of demand.

Effects of tungsten on the Environment

Tungsten metal powder administered to animals has been shown in several studies as not altogether inert. One study found that guinea pigs treated orally or intravenously with tungsten suffered from anorexia, colic, in coordination of movement, trembling, dispend and weight loss. This product is not expected to be hazardous for the environment. No specific ecotoxicity data is available for this product. Tungsten alloy environment friendly is more and more popular of public.

For many years, lead and depleted uranium were commonly used as a functional, cost-effective, and reliable choice in the manufacturing of munitions. When first brought into use, scientists knew little about the environmental effects of these materials. Depleted uranium was typically seen as constituent of kinetic energy penetrators (which uses kinetic energy to penetrate the target) in medium to large caliber munitions. Lead, most frequently used in small arms ammunition, was at that time also found in a variety of household products such as gasoline, rubber, paint, and printing supplies.

It was only after decades of use that scientists revealed that these materials pose serious threats to the environment. The search was on for a "green" alternative in munitions components.

Extensive analysis resulted in the testing of tungsten (W), a naturally occurring element that exists in the form of minerals and other compounds, as a replacement for lead in small arms ammunition. Tungsten was considered to be environmentally benign, relatively insoluble in water, and nontoxic. Furthermore, tungsten-based munitions performed the same and were similar in costs to lead alternatives.

It seemed to be the ideal solution for greener munitions. Through the Department of Defense's (DoD) Green Ammunition Program, the lead core in military bullets was replaced with tungsten composites. The DoD hoped to save millions in remediating contamination while at the same time contributing towards advancements in green technology.

However, after years of tungsten use, the DoD chose to re-evaluate the material's potential environmental impact. Researchers from Stevens Institute of Technology identified a growing concern that tungsten was not as "green" as initially thought, and began investigating how a cooperative pursuit of improved environmental protection and DoD requirements may be beneficial.

In response to this concern, Professors Christos Christodoulatos and Washington Braida of the center for environmental systems have undertaken a massive research effort aimed at identifying the specific nature of tungsten-based munitions and ultimately at minimizing the life-cycle environmental impacts and cost of munitions by researching the DoD's triple bottom line: mission, environment, and community.

Tungsten Alloy Health

Tungsten Alloy Health

Studies now show that tungsten, which is also used in welding, metal cutting, and other applications, is not as chemically inert as previously thought. Some forms of tungsten can move readily though soil and groundwater under certain environmental conditions. Both the U.S. Department of defense and the environmental protection agency now classify the element as an "emerging contaminant" of concern. Tungsten alloy material is widely used as substitution for lead, and is considered as tungsten alloy health material working as fishing weight and military fitting parts compared with DU.

Scientists think that tungsten is much less toxic than lead or mercury. Tungsten has been shown to act by antagonizing the action of the essential trace element, molybdenum. Long industrial experience has indicated no pneumoconiosis to develop among workers exposed solely to W or its insoluble compounds.

In order to protect patients, doctors, nurses and other people who may be exposed to radiation, sources of the radiation must be safely separated and shielded. It is crucial that holding and delivery instruments for radioactive materials would keep the radiation levels low enough, not to create harmful effects of ionizing radiation such as breast cancer, skin cancer, etc. Lead and steel are the traditional protection materials, but tungsten alloy radiation shielding is without a doubt the best solution. Excellent radiation-absorption, twice the density of lead and good physical resistance is main reasons to use tungsten alloy radiation shielding. Tungsten alloy health is a hot topic for environment protection and human protection from radiation.

Compared to traditional radiation shielding materials such as lead and boron carbide, tungsten alloys provide excellent density with small capacity. With the same weight, high-density alloy can provide the same energy absorption as lead using 1/3 less space.

Tungsten heavy alloy is best choices for tungsten alloy health applications, in both medical and industrial settings. Tungsten alloys radiation shield provide excellent alternative for traditional radiation shielding materials. High-density tungsten heavy alloy radiation shielding can provide the same energy absorption as lead using 1/3 less material. People are taking advantage of tungsten alloy's reliable radiation shielding properties.

Tungsten X-ray Protection Apron

Tungsten X-ray Protection Apron

Tungsten X-ray Protection Apron From Tungsten Powder Used in Medical Fields

To protect our health from the radiation, tungsten X-ray protection apron becomes more and more popular in medical areas. With the development of our daily life, more and more machines are used by people both in medical and other industries which brought much more radiation for us than ever, such as X-ray radiation, gamma radiation (energetic electromagnetic radiation), radiation of alpha particles (helium atoms) beta particles (electrons) and cosmic radiation, etc. they are very harmful to our body, there also comes a lot of shielding made by tungsten heavy alloy such as tungsten X-ray protection apron from tungsten powder which is very popular in medical especially when the patient makes a panorama X-ray. 

Tungsten powder can provide the same degree of protection as lead whilst significantly reducing the overall volume and thickness of shields and containers. Besides, compared with lead or depleted uranium in the past, tungsten powder is more acceptable in this case, for they are non-toxic. That's why tungsten powder is very popular as the material to make shielding.

Tungsten X-ray protection apron made from tungsten powder equally protects against the radiation, as tungsten powder is high density with small volume, good corrosion resistance, and high temperature resistance, non-toxic and environmentally friendly.

There are wolfram anodes making from tungsten powder in the X-ray machine but the patients also have to wear a tungsten X-ray protection apron from tungsten powder when they are making panorama X-ray of teeth or other parts on the body, due to the environmental reasons this apron is made of tungsten powder dispersed in late. Tungsten anodes made from tungsten powder are used in the X-ray machine; modern aprons are filled with tungsten powder, calcium tungsten powder is still used as fluorescent material in X-ray films. Tungsten powder product becomes more and more popular because of its good properties.

Tungsten alloy shielding made from tungsten powder is also used in applications such as collimator, nuclear shielding, beam stop, vial shield, isotope container, PET syringe shield, multi leaf collimator, FDG container, etc. Chinatungsten can provide several of tungsten powder products as your requirements.

Tungsten Powder for Tungsten X-Ray Protection Apron

Tungsten Alloy Brachytherapy Shielding

Tungsten Alloy Brachytherapy Shielding

Tungsten Alloy Brachytherapy

It is possible to use an alternative type of radiotherapy, which is known as afterloading (a version of brachytherapy) when it is difficult to access the diseased cells directly. Tungsten alloy brachytherapy technique consists of implanting a radioactive seed inside the patient's body, via a catheter. Before and after treatment the seed is kept in a large tungsten safe, tungsten alloy radiation shielding is used to protect the patient and medical staff against radiation in the treatment. Chinatungsten is a professional tungsten alloy products manufacturer who can provide all kinds of tungsten alloy radiation shielding products used in the technique.

Tungsten Alloy Brachytherapy Shielding

When it is difficult to access the diseased cells directly, it is possible to use an alternative type of radiotherapy, known as afterloading (a version of brachytherapy shielding). This technique consists of implanting a radioactive seed inside the patient's body, via a catheter. Before and after treatment the seed is kept in a large tungsten safe, to protect the patient and medical staff against radiation.

Tungsten Alloy Brachytherapy Shielding Purpose

Tungsten alloy brachytherapy shielding is an integral part of the treatment regimen for cervical cancer and, generally, outcome in terms of local disease control and complications is a function of dose to the disease bed and critical structures, respectively. Therefore, it is paramount to accurately determine the dose given via brachytherapy to the tumor bed as well as critical structures.

Why Use Tungsten Alloy Brachytherapy Shielding?

Compared to traditional radiation shielding materials such as lead and boron carbide, tungsten alloy brachytherapy shielding provides excellent density with small capacity. At the same weights high density alloy can provide the same energy absorption as lead using 1/3 less material.

When the weight is certain, more density, denser, and the thickness would be thinner. Tungsten alloy brachytherapy shielding could be made with thinner thickness but high absorption of radiation in high density. That is why tungsten alloy material is suitable for radiation shielding. Tungsten alloy brachytherapy shielding is better than lead materials for it is non-toxic.

During design of tungsten alloy brachytherapy shielding, tungsten alloy brachytherapy shielding is calculated according to requirements of shield to abate the multiple shielding materials' thickness.

Formula: K = e0.693 d / △1/2
K: Shield weakened multiple
△ 1/2: The shielding material of the half-value layer values
d: Shielding thickness, with the half-value layer thickness of their units, you need to half-value layer thickness of the quality of translation into the thickness of the material, divided by the density of the material can be obtained.

Tungsten Alloy Intracavitary Brachytherapy Shielding Conclusions

Utilizing an S&S imaging method in conjunction with prototype applicators that feature movable interovoid shields, they were able to acquire artifact-free image sets in a clinically applicable geometry. MR images were acquired of a phantom applicator that contained shields composed of a novel tungsten alloy. Artifacts were largely limited to regions within the ovoid cap and are of no clinical interest. The second generation A3 utilizes this material for interovoid shielding.

Tungsten Funnel Shielding

Tungsten Funnel Shielding

In order to protect patients and other people from harmful effects of ionizing radiation, a type of excellent radiation-absorbing material is badly needed. For this reason, tungsten alloy radiation shielding is becoming more and more popular.

Tungsten alloy funnel shielding is a suitable raw material for radiation protection, as its combination of radiographic density (more than 60% denser than lead), machinability, good corrosion resistance, high radiation absorption (superior to lead), simplified life cycle and high strength. Tungsten heave alloy funnel shielding can provide the same degree of protection as lead whilst significantly reducing the overall volume and thickness of tungsten funnel shielding and containers. Besides, compared with lead or depleted uranium in the past, tungsten heavy alloy funnel shielding is more acceptable because they are non-toxic.

The most effective utilization of tungsten, out of many, will be achieved after evaluation of several key factors (space/environmental considerations, long-term storage/disposal and potential for multiple applications) on the prospective application. Though not cost-beneficial for “ordinary” shielding applications, when properly selected as the shielding material, does avoidance exceeding that of lead will be achieved.

Tungsten funnel shielding possesses a high density of 19.25 g/cc (the density of lead is 11.34 g/cc). Where tungsten gains the advantage is in the ease of blending into plastic for extrusion or molding into custom shapes and sizes. Tungsten funnel shielding also differs from lead in that is virtually non-reactive and non-toxic. This eases handling requirements and minimizes issues associated with lead use such as long-term disposal and the potential characterization as a mixed hazardous waste.

Tungsten Alloy Funnel Shielding Application

Tungsten heavy alloy funnel shielding is applied in the area of glass fiber, refractory aluminum silicate fiber, construction materials, discharging tungsten funnel shielding for smelting materials.

Why Use Tungsten Alloy Funnel Shielding?

Compared to traditional radiation shielding materials such as lead and boron carbide, tungsten funnel shielding provides excellent density with small capacity. At the same weights high density alloy can provide the same energy absorption as lead using 1/3 less material.

During design of tungsten funnel shielding, tungsten heavy alloy funnel shielding is calculated according to requirements of shield to abate the multiple shielding materials’ thickness.

Formula: K = e0.693 d / △1/2
K: Shield weakened multiple
△ 1/2: The shielding material of the half-value layer values
d: Shielding thickness, with the half-value layer thickness of their units, you need to half-value layer thickness of the quality of translation into the thickness of the material, divided by the density of the material can be obtained.

Tungsten Alloy Vial Shield

Tungsten Alloy Vial Shield

Tungsten Alloy Vial Shield Description

• High strength tungsten heavy alloy, virtually unbreakable
• Inside height and diameter sized specifically for the reaction vial
• Removable top and bottom to minimize exposure during vial transfer
• The tough tungsten will retain its shape under the roughest handling and is virtually unbreakable
• Safe handling of radioactive liquids

Tungsten alloy vial shield is designed to greatly reduce exposure to vials containing liquid radioisotopes. The shield is constructed of .19" (.48 cm) thick tungsten, equivalent to .38" (1 cm) lead at 150 keV.

They can be loaded from the top or bottom of the shield. A loss-proof slide injection port on the top allows easy access to the vial septum.

Customized design：Thickness and inner diameter

Tungsten Alloy Vial Shield

Chinatungsten vial shield have a unique sliding cover that is thicker and provides more shielding than our traditional “swing-top” vial shields. It is designed to be ergonomically operated with only the thumb, providing safe and efficient one-handed operation.

With brass-threaded removable tops and bottoms our vial shield allow for the insertion of the vial into the vial shield from either end, whichever suits your particular situation and protocols.

Plastic inserts are available for all our vial shields in order to safely accommodate smaller vial sizes.

Flip Top Tungsten Alloy Vial Shield

Our flip-top tungsten alloy vial shield provides substantially thicker shielding as well as the convenience and safety of a gravity-operated top closure.

The flip-top tungsten alloy vial shield can accommodate larger vials than our smaller modular design vial shields.

Plastic inserts are available for all vial shields in order to safely accommodate smaller vial sizes.

Tungsten PET Shields

Tungsten PET Shields

What is PET?

Brachytherapy positron emission tomography (PET) is one of the nuclear medicine techniques available for diagnosis. Whilst X-rays provide information on the structure of the body, PET shows the chemical function of a particular organism. PET involves the injection of FDG (a glucose-based radionuclide) from a shielded syringe into the patient. As the FDG travels through the patient's body it emits gamma radiation which is detected by a gamma camera, from which the chemical activity within cells and organs can be seen. Any abnormal chemical activity may be a sign that tumors are present. PET scans are frequently used to detect cancerous tumors and diseases of the brain and coronary arteries.

Tungsten PET Shields Systems

Positron emission tomography (PET) is one of the nuclear medicine techniques available for diagnosis. Whilst X-rays provide information on the structure of the body, tungsten PET shields show the chemical function of a particular organism. Tungsten PET shields involve the injection of FDG (a glucose-based radio nuclide) from a shielded syringe into the patient. As the FDG travels through the patient's body it emits gamma radiation, which is detected by a gamma camera, from which the chemical activity within cells and organs can be seen. Any abnormal chemical activity may be a sign that tumors are present. PET scans are frequently used to detect cancerous tumors and diseases of the brain and coronary arteries.

Tungsten PET Shields Dispensing System

The solid tungsten PET shields dispensing system permits the safe dispensing of high- energy PET radiopharmaceuticals without the need for expensive remote handling systems .The magnetic "docking" feature of the solid tungsten syringe shield into the dispensing pig allows low exposure dose drawing .It is designed with 3.5 cm thick walls and accommodates up to a 30ml vial.

Tungsten PET Shields Dispensing Pig 30ml

Tungsten PET shields dispensing pig provides a full 3.5 cm of solid tungsten to safely shield high energy PET radiopharmaceuticals. Designed to accommodate 30ml vials (adapters are available for smaller vials).The threaded lid attaches to the body of the pig so that no radiation "shine through" occurs .The tungsten stopper, with attached pull ring ,is held in place magnetically. The handle permits the pig to be easily carried as a transport container as well as a dispensing pig. Weight 43 lbs.

Tungsten PET Shields 3/5cc

Tungsten PET shields magnetically docks with the PET Dispensing Pig .Designed to accept 3cc and 5cc B-D syringes ,it places the needle inside the vial septum when engaged .The body of the shield is constructed of solid tungsten 2.1cm thick for maximum shielding .The external calibration rod allows the precise volume to be withdrawn without a leaded glass viewing port ,where high exposure levels cannot be adequately shielded .The system allows the plunger to be pulled back with a pair of forceps ,allowing you to keep your exposure ALARA .Weight 5.8 lbs

Tungsten PET Shields for Pig TM Syringe

PET Pig TM permits the safe transport and administration of unit dose PET radiopharmaceuticals. It's constructed with solid tungsten walls 2.25cm thick and yet weighs only 15.6lbs.The "T" handle on the   PET Pig TM cap allows the unit to be easily lifted out of traditional "ammo can" delivery cases. The threaded top provides easy access to the 3 or 5cc syringe. The use of the thermos style handle reduces hand exposure by permitting the PET Pig TM to be carried to the imaging suite without holding container sidewalls. Prior to injection, the base unscrews, allowing the center portion to be used as a syringe shield.

Tungsten PET Shields Block

Specially designed for PET facilities or nuclear medicine departments that are working with high-energy positron emitting isotopes. Sturdy steel PET table makes rolling and maneuvering exceptionally easy .The ideal addition to labs performing these specialized exams.

Tungsten Alloy Stopper Shields

Tungsten Alloy Stopper Shields

Tungsten alloy is ideal for shielding against radiation. The very high density of tungsten alloy shielding (more than 60% denser than lead) allows a reduction in the physical size of shielding components, without compromising their rigidity or the effectiveness of the shielding characteristics.

Tungsten Alloy Stopper Shields Features

1. Tungsten heavy alloy stopper shield 50cm thick (concrete brick) around the 288cm tungsten alloy stopper shields.

2. Concrete tungsten alloy stopper shields before and after tungsten alloy stopper shields to stop the particles having interacted at or before the tungsten alloy stopper shields.
Tungsten heavy alloy stopper shield usually made of concrete 50cm thick, with an inner aperture of 110cm and an outer aperture of 160 cm the all length of the beam stopper. It leaves a layer of air of 15cm around the tungsten heavy alloy stopper shield.

Concrete tungsten heavy alloy stopper shield made as a tube of concrete 50cm thick, with inner aperture 35cm and outer aperture 85 cm, they are located around the quadruples with half length 508.5cm, before and after the tungsten heavy alloy stopper shield. This leaves a layer of air of about 14cm around the quads.

Tungsten heavy alloy stopper shield of concrete at the entrance of the detector is made of two pieces. a) A trapezoid, asymmetric located away in x from the detector aperture (considered at most the size of BQ5) but covering in y and with △z=2m.b) A tube of concrete around the detector aperture, 50cm thick with △z=2m.

The radius of the production vertex of those muons is reported versus z in figure 3 for the muons in the halo and in the wings of the beam. This figure represents and event simulated by grant with a layout with “vacuum” walls and no shielding but with a beam stopper of tungsten heavy.

Tungsten heavy alloy stopper shield has been chosen instead of iron. Both material have a similar dE/dx (iron has even slightly higher one); therefore the particle absorption is twice the absorption in iron. We will add concrete walls around the beam setup. We will then add various shielding to absorb the background from various sources, e.g. around the tungsten alloy stopper shields and to the quads next to it and close to the detector.

Tungsten Alloy Housing Shielding Radiation

Tungsten Alloy Housing Shielding Radiation

As medical science developing so repaid, there is more and more radiation in our life, which has become a new trouble, such as X-ray radiation, gamma radiation (energetic electromagnetic radiation), radiation of alpha particles (helium atoms) beta particles (electrons) and cosmic radiation, etc.

In order to protect patients and other people safe from harmful effects of ionizing radiation, such as breast cancer, skin cancer, etc. One type of excellent radiation-absorbing medium is badly needed. Tungsten alloy housing shielding radiation is more and more popular.

Tungsten alloy is ideal for shielding against X-rays and gamma radiation. The very high density of tungsten alloy housing shielding radiation (more than 60% denser than lead) allows a reduction in the physical size of shielding components, without compromising their rigidity or the effectiveness of the shielding characteristics.

Compared to traditional radiation shielding materials, tungsten alloys provide excellent value. A high-density alloy can provide the same energy absorption as lead using 1/3 less material! Unlike lead, you'll also reduce administration costs by eliminating the need to obtain special licensing—it's not required.

Clients all across the globe are taking advantage of tungsten alloy's reliable radiation shielding properties. If you need to protect yourself, your patients or your equipment from the harmful effects of excess radiation, come to us!

Our products are available as finished machined parts or as short rod, round bar, and rectangular blocks.

Nowadays, mobile phone is more and more popular, but radiation from mobile becomes a notable problem. The type of radiation emitted from mobile phones is electromagnetic radiation. It's present in mobiles because they use radio frequency (RF) waves to make and receive calls. The doses are considered to be very small as the emissions are low power (short range). Nevertheless, there are ways in which you can reduce exposure to these waves. There are various types of radiation but we won't get into the physics of atoms, neutrons and protons. To avoid body from mobile radiation has been a subject for most experts.

Tungsten alloy housing shielding Radiation is designed for managing large quantities of high-energy radio nuclides. A convenient lever allows quick adjustment of window to optimal angle for any user and procedures. A special plate with a hex-shaped recess is mounted on the base to facilitate one-handed loading and unloading of dose pigs incorporating hex-shaped bottoms.

Tungsten Alloy Radiation Room

Tungsten Alloy Radiation Room

Our tungsten alloys are used for radioactive source containers, gamma radiography, shields, and source holders for oil-well logging, and industrial instrumentation. High-density tungsten alloy radiation shielding in tungsten alloy inside radiation room also serve as collimators and radiation shielding in cancer therapy, as well as syringe protection for radioactive injections. When you need to direct a specific amount of radiation to a targeted area, tungsten alloy radiation room provides the control you need. Chinatungten's high-density alloys will continue to perform, even under extreme, high-heat conditions. We can provide tungsten alloy radiation room products as your requests.

Gamma radiation and X-rays are absorbed most effectively by high-density materials. Chinatungsten high-density materials are a family of tungsten alloy radiation shielding materials with densities 50% greater than that of lead. The high-density, good mechanical strength and excellent mach inability of AT&M materials make them ideal for shielding applications. Tungsten alloy radiation room products are our leader products. A variety of sizes and shapes are available in tungsten alloy radiation room. Tungsten alloy radiation room offered by us is qualified.

Tungsten alloy radiation room properties:

Tungsten content (wt %): 90-97

High density   16.0~18.5g/cm3

High strength   580~950Mpa

Advantages of tungsten alloy radiation room:
Good plastic
Good corrosion-resistant
Good machining property
High thermal conductivity
Low coefficient of thermal expansion
High mass absorption coefficient

Why Use Tungsten Alloy Radiation Shielding?

Compared to traditional radiation shielding materials in tungsten alloy radiation room such as lead and boron carbide, tungsten alloy radiation shielding provide excellent density with small capacity. At the same tungsten alloy radiation shielding weights high density alloy can provide the same energy absorption as lead using 1/3 less material.

When the weight is certain, more density, more denser, and the thickness would be thinner. Tungsten alloy radiation shielding material could be made with thinner thickness but high absorption of radiation in high density. That is why tungsten alloy radiation shielding material is suitable for radiation shielding products.

During design of shielding, tungsten alloy radiation shielding is calculated according to requirements of shield to abate the multiple shielding materials' thickness.

Formula: K = e0.693 d / △1/2
K: Shield weakened multiple
△ 1/2: The tungsten alloy radiation shielding material of the half-value layer values
d: Tungsten alloy radiation shielding thickness, with the half-value layer thickness of their units, you need to half-value layer thickness of the quality of translation into the thickness of the material, divided by the density of the material can be obtained.

Tungsten Alloy Radiation Focusing Ring

Tungsten Alloy Radiation Focusing Ring

What Is Tungsten Alloy Radiation Focusing Ring?

Focusing ring used to adjust the lens so that the subject appears sharp on the film or CCD. Most cameras now have automatic focus (AF), some have manual focus override (MF) and some have a fixed focus (F) lens that ensures things from about 1.5 meters to infinity are relatively sharp. A few cameras have a power focus (PF), which is a manual method, using a motorized tungsten alloy radiation focusing ring. Lenses with a ring that allows a good grip make tungsten alloy radiation focusing ring easier to adjust and focus manually. We can provide tungsten alloy radiation focusing ring as your requirements and tungsten alloy radiation focusing ring offered by us is qualified.

A low-cost lens doesn't have a tungsten alloy radiation focusing ring. Found in very basic cameras. The lens is set to a distance of around three meters and relies on the depth of field to bring everything from about one and a half meters to infinity. The quality is always a compromise over a lens with adjustable focusing. Tungsten alloy radiation focusing ring is good to our health.

An optical device is built into older cameras or added as an attachment. That is used to work out the subject distance by comparing two viewpoints. You see a double image and adjust the lenses until the images form one which gives a distance reading that can then be transferred to the focusing ring.

As we know, all microelectronic have radiation when we used. In order to resistant radiation from these products, we have to protect measures to prevent it. Tungsten alloys is a best choices for tungsten alloy radiation focusing ring. Compared to traditional radiation shielding materials, tungsten alloy radiation focusing ring provide excellent value. A high-density alloy can provide the same energy absorption as lead using 1/3 less material. People are taking advantage of tungsten alloy reliable radiation focusing ring properties.

Why Use Tungsten Alloy Radiation Shielding?

Compared to traditional radiation shielding materials such as lead and boron carbide, tungsten alloy radiation shielding provides excellent density with small capacity. At the same weights tungsten alloy radiation shielding with high density alloy can provide the same energy absorption as lead using 1/3 less material.

When the tungsten alloy radiation shielding weight is certain, more density, more denser, and the thickness would be thinner. Tungsten alloy radiation shielding material could be made with thinner thickness but high absorption of radiation in high density. That is why tungsten alloy radiation shielding material is suitable for radiation shielding.

During design of shielding, tungsten alloy radiation shielding is calculated according to requirements of shield to abate the multiple shielding materials' thickness.

Formula: K = e0.693 d / △1/2
K: Shield weakened multiple
△ 1/2: The tungsten alloy radiation shielding material of the half-value layer values
d: tungsten alloy radiation shielding thickness, with the half-value layer thickness of their units, you need to half-value layer thickness of the quality of translation into the thickness of the tungsten alloy radiation shielding, divided by the density of the tungsten alloy radiation shielding can be obtained.

Lead Free Radiation Protection

Lead Free Radiation Protection

Most of radiation including ionizing radiation and non-ionizing radiation is harmful. Therefore, in order to protect ourselves from radiation, we have to take extraordinary measures and reduce the radiation to a minimum. We can provide different kinds of lead free radiation protection product as your requirements. Chinatungsten's product products are always highest quality. Tungsten heavy alloy is completely it, being comprised of tungsten with minor amounts of nickel and iron. Lead free radiation protection offers a number of advantages as tungsten alloy radiation shielding material for clinical use:

- Good corrosion resistance under ambient conditions
- Low toxicity
- Superior radiation attenuation compared to lead
- Damage resistant due to much higher mechanical properties than lead

Why Use Tungsten Alloy Radiation Shielding?

Compared to traditional radiation shielding materials such as lead and boron carbide, tungsten alloy radiation shielding provides excellent density with small capacity. At the same weights high density alloy can provide the same energy absorption as lead using 1/3 less material.

When the weight is certain, more density, more denser, and the thickness would be thinner. Tungsten alloy radiation shielding material could be made with thinner thickness but high absorption of radiation in high density. That is why tungsten alloy radiation shielding material is suitable for the products. Lead free radiation protection products provided by us are qualified.

During design of tungsten alloy radiation shielding, lead free radiation protection is calculated according to requirements of shield to abate the multiple shielding materials' thickness.

Formula: K = e0.693 d / △1/2
K: Shield weakened multiple
△ 1/2: The tungsten alloy radiation shielding material of the half-value layer values
d: tungsten alloy radiation shielding thickness, with the half-value layer thickness of their units, you need to half-value layer thickness of the quality of translation into the thickness of the lead free radiation protection products, divided by the density of the tungsten alloy radiation shielding can be obtained.

Internationalists and their team work within a zone of radiation “shade” created by the patient drapes.

Light weight, pliable, and lead free radiation protection shields are built into each sterile, disposable drape.

Clinical studies show that when placed directly on the patient, RADPAD cuts harmful scatter radiation by as much as ninety-five percent. Tungsten alloy radiation shielding is widely used in some areas.

While density remains an important characteristic for blocking alpha and beta radiation, thickness is less of a concern. A single centimeter of plastic is sufficient for shielding against alpha particles, as tungsten alloy radiation shielding is a half-inch of paper. In some cases, lead free radiation protection is ineffective in stopping beta particles because it can produce secondary tungsten alloy radiation shielding when passing through elements with a high atomic number and density. Instead, tungsten alloy radiation shielding can be used to form an efficient barrier for dealing with high-energy beta radiation. When negatively charged beta particles hit a high-density material, such as tungsten alloy radiation shielding, the electrons are blocked, but the target that the lead free radiation protection barrier is intended to protect can actually become irradiated.

Tungsten Alloy Multi-leave Collimator

Tungsten Alloy Multi-leave Collimator

Why Need Tungsten Alloy Multi-leave Collimator?

When people in the tumor or cancer treatment, more and more hospital commonly uses CT simulation system for image acquisition and patient respiratory motion analysis, and then radiation therapy is required. Tungsten alloy multi-leave collimator is usually used for protect patient from unnecessary radiation.

As we know, tungsten heavy alloy could provide the same energy absorption as lead using 1/3 less material, besides, it is environmental friendly, high density from 17.0 g/cm3 to 18.6 g/cm3 make tungsten alloy multi-leave collimator an excellent ability for radiation absorption, as it is dense enough to absorb radiation from the radiation therapy machine, so as to make patient safe.

How is Tungsten Alloy Multi-leave Collimator Radiation Ability?

Compared to traditional radiation shielding materials such as lead and boron carbide, tungsten alloy provides excellent density with small capacity. With the same weight, high-density alloy can provide the same energy absorption as thinner than other materials, tungsten alloy is a favorable material for somewhere needs great radiation absorption but allow only very small space.

We not only offer tungsten alloy multi-leave collimator based on the international standard, but also could design and make tungsten alloy collimator as per clients’ requirement. Usually, radiation ability could be calculated basing on the following formula:

Formula: K = e0.693 d / △1/2
K: Shield weakened multiple
△ 1/2: The shielding material of the half-value layer values
d: Shielding thickness, with the half-value layer thickness of their units, people need to half-value layer thickness of the quality of translation into the thickness of the material, divided by the density of the material can be obtained.

How Tungsten Alloy Multi-leave Collimator to Make Radiation Protection

According to the lesion target period of the motion, in the allowed setting range of motion, radiation ray beam from treatment machine triggers automatically, out and off, so as to control the movement of the couch, then it is followed with the movement of tumor (target), in this way, to make a real-time dynamic precise radiotherapy. This method is applicable for the treatment with the movement caused by respiratory motion in a larger degree of lung, liver, breast, etc. The whole process for treatment of cancer or tumors, such as chest, abdomen, is an infrared tracking the motion waveform of the surface reflection markers, through surface infrared reflective markers , using fluoroscopic image, so as to do the verified or treatment of disease, this would produces a certain radiation of the radioactive material. If there is no high performance material of radiation shielding as tungsten alloy multi-leave collimator the treatment device, then other parts of the patient is almost to be simultaneously exposed to radiation damage. It will be very terrible. Therefore, when the radiation source movement, then tungsten alloy multi-leave collimator could absorb radiation to protect the patient.