... 2.Anti-oxidation 3.High mechanical intensity 4.low soakage 5.High purity We manufacture all set of graphite heating ... polysilicon industrial furnaces, also called heat system, including graphite crucible,crucible support, sintering boats used in metallurgy, ... .Features:made of high pure graphite material, high resistance to temperature and corrosion, anti-oxidation, high mechanical intensity, low ...