... for many industries such as production of electrician casting materials, potting materials, grinding materials... It is earliest ... many industries such as production of electrician casting materials, potting materials, grinding materials, precise casting, ceramics, thermal insulation materials, etc., ... g/cm3 2.65Burnoff %≤0.08Thermal expansion rate 1/°C 4x10-6 Hardness 7 Volume resistivityΩ.cm > ...