| 摘要 |
PURPOSE:To reduce the valency of an added metal when a glass body is synthesized by a sol-gel process by carrying out vitrification by heating in an atmosphere of a nonoxidizing gas under reduced pressure. CONSTITUTION:Sol prepd. with alkyl silicate, fine silica particles and a compd. contg. a metallic element as starting materials is converted into gel and this gel is dried. The resulting dry gel is heated at >=300 deg.C in an atmosphere of an inert gas such as He, Ar or N2, hydrogen or a reducing gas such as CO or H2S under reduced pressure. By the heating, the pores in the dry gel are sealed to obtain a glass body. |
