焼結法による無水・透明シリカガラスの作製条件

概要

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Green compacts of high-purity silica powders with different particle sizes were formed by slip casting method and pressureless-sintered. Conditions to fabricate transparent silica glasses are presented using diagrams described by sintering-temperature and -time. The variation of linear shrinkage with time reveals that the sintering mechanism at its early stage follows the viscous flow of silica glass particles. The effect of firing schedule on residual OH concentration was studied for transparent sintered silica glasses. A green compact prepared by silica powders with a mean particle size of 1.6 μm was fired at 1573 K for 3h for dehydration and heated up to 1873 K for densification; this typical fabrication condition results in a transparent sintered silica glass with <1 ppm OH concentration.
社団法人日本セラミックス協会の論文
1997-02-01