PROCESS FOR PRODUCING POLYCRYSTALLINE TRANSPARENT CERAMIC SUBSTRATE AND PROCESS FOR PRODUCING SPINEL SUBSTRATE

摘要

Disclosed is a process for producing a polycrystalline transparent ceramic substrate for use, for example, in a transparent substrate for a liquid crystal projector. The production process is characterized by comprising the steps of sintering a ceramic body molded in a predetermined form to prepare a sintered compact of the polycrystalline transparent ceramic body, cutting the sintered compact of the polycrystalline transparent ceramic body to prepare a plurality of cut polycrystalline transparent ceramic bodies, polishing the cut surface of the cut polycrystalline transparent ceramic bodies to prepare polished polycrystalline transparent ceramic bodies, and coating the polished polycrystalline transparent ceramic bodies with AR to prepare coated polycrystalline transparent ceramic bodies.