Molybdenum News Center

Sapphire Dan Changjing Furnace Protective Atmosphere

Dan Changjing Sapphire crystal growth furnace environment can be divided into two kinds of high vacuum and protective atmosphere . High vacuum growth temperature field advantage is not only consider the effect of convection radiation shot, crystal growth reducing atmosphere will bring convection problems, such high temperatures for sapphire crystal , convection may cause temperature field complex, growing to be considered to be more problems than vacuum . Different crystal growth method commonly used heat source is not the same , thus selecting the protective atmosphere is also somewhat different . Russian classic Kyropoulos tungsten single crystal furnace heating element , high- vacuum environment . It is understood that the general adoption of domestic tungsten and molybdenum crucible grown sapphire furnace atmosphere is actually true is a weak oxidizing atmosphere , but many experts believe that this is impossible.

In short , no matter what method of crystal growth , crystal growth regardless of the high vacuum environment or take reducing oxidizing atmosphere , to reduce the cost of the crucible and the crucible with the pollution caused by the current urgent need to study and solve problems .


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