... products with competitive price 1.high hardness, small coefficient of expansion, brittle property and good thermal conductivity 2.ISO9001: ... coke (C) as raw materials at a high temperature of 1800 Celsius or above, featured by high hardness, small ... as a deoxidant in abrasives, grinding of electronics, refractory, special ceramics, foam ceramics, modification of coating and plastics, auto parts, war ...