... board, graphite felt, graphite insulation cylinders, and carbon-carbon composites (CFC). Mainly used as insulation in high ... different kinds of crystallization production, sintering monocrystalline silicon for semiconductors. Since these furnaces work at extremely ... , Tempering, etc.Crystal Growing Industry:Heat Insulation for Silicon, SiC, Indium Phosphide, Gallium Arsenide, Sapphire, Optical ...