Technical Parameters：

Uniform Temperature Zone Size: Φ460mm×500mm 

Max Temperature：1950℃  

Working Temperature：1850℃   

Heater Form：Side tungsten sheet heater as main heater, upper and

bottom tungsten rod heater as compensation heater 

Charging Method: 5 layers supporting tray, 4 tungsten crucibles arranged on every layer  

Working Atmosphere：Hydrogen and Nitrogen
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