Molybdenum Crucible Furnace with Sapphire Crystal

molybdenum crucible

Currently used sapphire crucible furnace iridium crucible ,crucible molybdenum crucible.From a practical point of view,iridium crucible minimal contamination of sapphire,but the price is too expensive,the cost is high ; while tungsten and molybdenum crucible crucible relatively cheaper,but contamination is relatively large.

Using iridium crucible generally iridium crucible itself is the heat generator, but using tungsten,molybdenum crucible is less used crucible itself do heat. Ikal-200 type crystal growth furnace,using molybdenum crucible,molybdenum heat shield,tungsten heating body,volatile at high temperatures molybdenum and tungsten atoms.Of course,tungsten,molybdenum crucible itself is not doing no heating element,is relative,process selection and temperature field settings are very critical factor.Different crystal growth method using the crucible will be different, such as the Kyropoulos (KY) Average of tungsten crucible , heat exchange method (HEM) generally used molybdenum crucible,because the heat exchange last to fall through to take a single crystal,and the molybdenum crucible cheapest price . According crucible manufacturing process, can be divided into pressed and sintered crucible and the crucible spinning,pressed and sintered crucible of lower quality,purity,low density,relatively short life,the price is relatively cheap;spinning crucible of higher quality, purity ,density higher , longer service life , high price.Domestic crystal growth furnace is generally used to suppress sintering crucible .

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