... , different kinds of crystallization production, sintering monocrystalline silicon for semiconductors. Since these furnaces work at extremely ... can withstand such high temperatures. Moreover, for energy conserving purposes, quality heat insulation material is the ... Hardening, Tempering, etc.Crystal Growing Industry:Heat Insulation for Silicon, SiC, Indium Phosphide, Gallium Arsenide, Sapphire, Optical ...