Tungsten for Sapphire Growth Furnace

Tungsten for sapphire growth furnace is for its unique properties, especiaaly for its high melting point and high temperature resistance. Porducts of tungsten for sapphire growth furnace includes tungsten crucible, tungsten plate, tungsten sheet, tungsten cover, tungsten wire, tungsten heater, tungsten heat shield, tungsten electrode screen and tungsten rhenium. And tungsten rhenium wire is not pure tungsten products, but mixing tungsten with rhenium. The most widely used one is with 25% rhenium.

Tungsten for sapphire growth furnace is steel-gray to tin-white hard metal and it is very brittle, which is difficult to be processed. The manufacturing techniques of tungsten are forging, swaging and extrusion. The melting point of tungsten is 3415 ° C. The corrosion resistance is the unique property of tungsten, most of the inorganic acid erosion is can not influence tungsten. Tungsten products will be formed on the surface of a layer of protective oxides in the air, but will be completely oxidized at high temperatures.

Sapphire is an alumina (alpha-Al2O3) single crystal, also known as corundum. The sapphire crystals with excellent optical properties, mechanical properties and chemical stability, high strength, hardness, resistance to erosion, can be work under adverse conditions close to the high temperature of 2000 ℃, which is widely used in infrared military installations, satellite space technology, high-intensity laser window materials, its unique lattice structure, excellent mechanical properties, good thermal properties of sapphire crystal the practical application of semiconductor GaN/Al2O3 of light-emitting diodes (LEDs), LSI SOI and SOS and superconducting nano-structured thin film is the most ideal substrate material.

tungsten-crucible

Sapphire single crystal sapphire growth furnace is designed to nurture Kyropoulos. This method is used the raw materials (aluminum oxide) tungsten crucible to be heated to its melting point of 2050 degrees or more, and then gradually reduced the melting temperature and the crystallization into specific granules. The growth furnace is constructed in a closed mold in the insulation with a special shell, lid and heater. Therefore tungsten products are used for growing sapphire crystal.

Tungsten is widely used in the sapphire grwoth furnace is because tungsten for sapphire growth furnace owms the properties of high temperture resistance, which will not melt with sapphire.

If there is any other inqury refer to tungsten for sapphire growth furnace, please feel free to contact us through the following methods:

Email：sales@chinatungsten.com
Tel.：+86 592 512 9696
Fax:+86 592 512 9797

Tungsten products

Tungsten products

Tungsten was discovered in 1781 by the Swedish chemist, Karl Wilhelm Scheele. Tungsten is both the most abundant of the refractory metals, and has the highest melting point of all metals, at 3,410 °C (6,170 °F). Tungsten wire filaments provide the vast majority of household incandescent lighting, but are also common in industrial lighting as electrodes in arc lamps. Gas tungsten arc welding (GTAW, also known as tungsten inert gas (TIG) welding) equipment uses a permanent, non-melting tungsten electrode. The most common use for tungsten is as the compound tungsten carbide in drill bits, machining and cutting tools. It also finds itself serving as a lubricant, antioxidant, in nozzles and bushings, as a protective coating and in many other ways. Tungsten can be found in printing inks, x-ray screens, photographic chemicals, in the processing of petroleum products, and flame proofing of textiles. Tungsten is also used by virtue of its strength and density, in applications ranging from weights in helicopter rotors and weapon projectiles to the heads of golf clubs. The largest reserves of tungsten are in China, with deposits in Korea, Bolivia, Australia, and other countries.
 
The main tungsten products include tungsten concentrate, ferrotungsten, APT, deep-processed tungsten products, tungsten bar, tungsten wire filament and so on.

Tungsten Alloy

Tungsten Alloy

Tungsten alloy, also named tungsten heavy alloy, generally is refractory metal, which have two-phase composites consisting of W-Ni- Fe or W-Ni- Cu or even W-Ni-Cu-Fe, some tungsten alloys are added Co、Mo、Cr, etc. They have very high melting point and have a density twice that of steel and are more than 50% heavier than lead. Tungsten content in conventional heavy alloys varies from 90 to 98 weight percent and is the reason for their high density (between 16.5 and 18.75 g/cc). Nickel, iron and copper serve as a binder matrix, which holds the brittle tungsten grains together and which makes tungsten alloys ductile and easy to machine. Nickel-iron is the most popular additive, in a ratio of 7 Ni: 3Fe or 8Ni: 2Fe (weight ratio). The conventional processing route for tungsten heavy alloy includes mixing the desired amount of elemental powders, followed by cold pressing and  liquid phase sintering to almost full density. 
 

Molybdenum-Tungsten

Molybdenum-Tungsten(Tungsten-Molybdenum)

Molybdenum (Mo) and tungsten (W) are two elements in the same column of the periodic table. They also behave similarly in nature. The average concentration in the Earth's crust is 1.5 ppm for both elements. Molybdenum is an essential nutrient for plants and animals. At large concentrations, Mo may be toxic. This is sometimes the case for leachates from alkaline ashes. Tungsten is an important strategic metal that is used in a variety of industrial applications. It is usually mined from scheelite, CaWO4, och wolframite, (Fe,Mn) WO4. Tungsten is released to the environment, e.g. through its use in winter tires and ammunition. On the whole, the environmental behaviour of tungsten is not well known. 
 

Cemented Carbide Drawing Dies

Cemented Carbide Drawing Dies

Cemented carbide drawing dies have a wide range of USES, such as electronic devices, radar, television, instruments and spaceflight high-precision silk material used and common tungsten, molybdenum wire, stainless steel wire, cable wire and various alloy with SiDou is drawing mode control out of the diamond, diamond wire drawing die due to the natural diamond, which has strong as raw materials of high wear resistance, the use of life. 
  

Cemented Carbide Punching Dies

Cemented Carbide Punching Dies

Cemented carbide punching dies are technology-intensive products and essential to the process of stamping production equipment. The stampings quality, production efficiency, and production costs are relative to the mold design and manufacturing. The level of mold design and manufacturing technology is one important indicator to measure a country's level of product manufacturing, to a large extent determine the quality, effectiveness and developmental capabilities of new products. 
 

Cemented Carbide Plates

Cemented Carbide Plates

Cemented carbide plates have good wear resistance and strong impact resistance. We can produce various cemented carbide plates, including standard plates, sheets, strips and so on. Standard plates are widely used in the manufacture of various alloy mold, large stamping dies and is widely used in the electronics industry, IC industry, LED lead frame, etc. Long sheets are widely used in the manufacture of a variety of metal and non-metal cutting tools, wear-resistant tools such as planer, broaches. Strips are applied in the production of a variety of woodworking tools, cut hob, planer knives, slitter and all kinds of special-shaped tool. Our company can supply all kinds of cemented carbide products according to customers' specific requirements.
   

Cemented Carbide Rods

Cemented Carbide Rods

Cemented carbide rods are widely applied in the production of a variety of solid carbides including PCB micro drill, drill bits, end mill, reamer, etc used in the processing of aluminum alloy, stainless steel, heat-resistant alloy steel, nodular cast iron, nickel and titanium alloy, non-ferrous metal etc. They are also used in the manufacturing of a variety of plug ins, silicon steel, cold rolled sheet, stainless steel punch, Thimble and punch, etc.
   

Tungsten Bar

Tungsten Bar

Tungsten bar is mainly used to found ingredient of material, cutter and heads, tungsten wire for lights instruments, electric contact points and conductor of heat, crankshaft and cylinder barrel of advanced automobile, ingredient of kinds of heat-resistant steel. Also used for making special steels, to make guns, artillery rockets, satellite airplane and ship. Tungsten bars have a luster rather like that of silver in uniform color. Though the whole tungsten bars may slightly curve, the maximum height of the bend should not be more than 7mm. 
 

Tungsten Nozzle

Tungsten Nozzle

Tungsten nozzle can be manufactured from the material of pure tungsten, tungsten alloy and tungsten carbide. They have different prosperities, such different density, the density of pure tungsten nozzle is about 19.2~19.3g/cm3, the density of tungsten alloy nozzle is about 15-18.5g/cm3 and the density of tungsten carbide nozzle is about 14.4-1g/cm3. 
 

Tungsten Stream Mouth

Tungsten Stream Mouth

The tungsten stream mouth is as a special tungsten alloy with other refractory metals. It mainly uses in rare-earth metal smelting, the induction furnace heating element, the quartz glass smelting and so on, makes the high temperature vessel.

In the glass and the ceramic industry, the tungsten class mouth is a ceramic micro production very essential part. The tungsten proportion is big, degree of hardness is big, the heat conduction electric conductivity good, heat-resisting, wear-resisting, anti-corrosive, has the low expansibility and the size stability under the high temperature. The tungsten melting point is highest when all metals (reaches as high as 3380 degrees Celsius), the steam tension to be lowest, the tensile strength is highest (1650℃), and its antiseptic property is good, the majority inorganic acid are very small to its corrosion.
   

Tungsten pin

Tungsten pin

Tungsten pin is pin made of the material—tungsten. Since it is made of tungsten, tungsten pin owns the properties of high melting point, high corrosion resistance, tensile strength and low coefficient of thermal expansion. When added steel or other element, its hardability would be improved. 

The surface condition of tungsten pin is smooth and bright. Moreover, no stain, dirt, oxides, drawing tracks, scratches and damages are admitted on the surface of tungsten pin.
  

Tungsten Needle

Tungsten Needle

Tungsten needle is widely used in the construction of furnace tooling and parts and as a feedstock for the fabrication of parts for the electronics and semiconductor industries. Surface can be supplied in a shiny or matte; dependent upon the thickness and width parameters. 

Tungsten needles grown from hexacarbonyl tungsten vapors in a glow-discharge condition are described. The needle growth occurs on a tungsten substrate in a temperature range from nearly room temperature to 1500 °K, but needles produced below and above ~1100 °K are quite different in morphology and crystalline state. The products at lower temperatures are tungsten particles agglomerated in dendrite like shapes while those at higher temperatures possibly are whiskers.
   

Tungsten ball

Tungsten ball

tungsten ball for RC-cars

Tungsten ball is the general term for pure tungsten ball, tungsten alloy ball and tungsten carbide ball. 

Pure tungsten ball is used the material of pure tungsten whose density is over 19.2g/cm3, and it is the highest density among tungsten balls. Another reason for applicator using pure tungsten ball is that tungsten ball has the highest melting point.


Tungsten alloy ball is tungsten ball alloy with Ni and Fe, or other metal element to improve other properties of tungsten, such as to make unbrittle and easy to be processed. Tungsten alloy ball can be marked words on the ball, but pure tungsten ball has no such properties.
     

Tungsten point/contact

Tungsten point/contact

Tungsten point/contacts are for use in high voltage applications, usually where highly repetitive switching is required. Tungsten has a melting temperature of 3,380℃ which gives it excellent arc-erosion resistance. Tungsten may develop troublesome oxide films, especially when used as the anode contact in some DC applications. Therefore, tungsten is often used as the cathode contact, and a palladium alloy used as the anode contact. Such a combination also minimizes contact interface resistance and material transfer.
   

Tungsten electrode

Tungsten electrode

Tungsten electrode

An electrode is an electrical conductor used to make contact with a nonmetallic part of a circuit (e.g. a semiconductor, an electrolyte or a vacuum). The word was coined by the scientist Michael Faraday from the Greek words elektron (meaning amber, from which the word electricity is derived) and hodos, a way. 

Tungsten sheet

Tungsten sheet

Tungsten sheet

By special processing, produce hot-rolling and cold-rolling products with high quality tungsten slabs, such as tungsten electrode plate, heater, heat-shield and tungsten boats etc, which are used in electronics, electronic-vacuum and illumination etc. 

Tungsten plate

Tungsten plate

Tungsten plate is widely used in the construction of furnace tooling and parts and as a feedstock for the fabrication of parts for the electronics and semiconductor industries. Surface can be supplied in a shiny or matte; dependent upon thickness and width parameters. 

Tungsten Boat

Tungsten Boat

As a special and effective boat vessel, tungsten boat is widely used in metallizing, electron-beam spraying as well as the heat process with sintering and annealing in vacuum coating industries. 

Tungsten boats sources are used for the vacuum evaporation of materials that are in granular or pellet form. They can also be used to evaporate small lengths of wire or to evaporate materials which would not properly "wet" the surface of an evaporation filament. These boats are ideal for use in small evaporation systems, such as bell jars, for experimental and prototype work.

Tungsten Heater Model(3)

Tungsten Heater Model

Tungsten Heater Model No.10~12

Tungsten Heater Model No.13~15