Glass mould is the main production technology and equipment, glass products mainly divided into container glass mould and class glass mold, mold in the process of using inner cavity quality decided to the surface of the glass products quality and production efficiency. Therefore, the cavity surface has high precision and smooth finish. Due to mold frequently come in contact with the molten glass of 700 ℃ ~ 1100 ℃, under oxidation and thermal fatigue, growth, at the same time, the mould of contact with the glass of the friction and wear, which requires the mold material has good heat resistance, wear resistance, corrosion resistance, thermal shock, resistance to oxidation, long resistance and thermal fatigue resistance and oxidation resistance is the main performance index. In addition, the mold is also required to be compact, easy to process, thermal conductivity, and low thermal expansion coefficient.