MOLDING DIE FOR GLASS HARD DISK SUBSTRATE

摘要

Disclosed is a molding die for glass hard disk substrates which is hardly reactive with glasses, while having high wear resistance and high durability. A glass molded therein can be easily released from the surface of the molding die. Specifically disclosed is a molding die for glass hard disk substrates, which contains a silicon carbide-carbon composite ceramic. The silicon carbide-carbon composite ceramic contains 15-50 parts by weigh of carbon per 100 parts by weight of silicon carbide, and the average particle diameter of the carbon is within the range of 0.3-100 µm.