Alumina Ceramics is mainly made from alumina. The ceramics after moulding, high-temperature sintering is featured with good heat resistance, resistance to pressure, abrasion resistance, high insulating strength, mechanical strength, low thermal expansion conefficient. Usage: it can be used for the electronic and electotechnical equipment, apparatus and meters, household electrical appliances, electrical appliances, electronic vacuum instrument, communication equipment, temperature controlling switch, high-grade ceramic brake, slip sheet of tap etc.