PROCESSO PARA A PRODUCAO DE UM MATERIAL BASICO DE VIDRO DE SILICA E PROCESSO PARA TRATAMENTO DO MESMO

摘要

A silica-based glass rod (31) is inserted into a space portion of a mold (21). Then, a slurry (32), which is obtained by dispersing a silica glass powder material in pure water, is poured into a molding space between the glass rod (31) and the inner surface of the mold (32), whereby a porous glass shaped body (34) is formed around the glass rod (31). Drying this shaped body results in a silica glass base material which includes the glass rod (31) and the porous glass shaped body (34) surrounding the same.