发明名称 |
PRODUCTION OF SILICA GLASS |
摘要 |
PURPOSE:To obtain a silica glass prevented from crack or fissure development by gelling a sol solution prepared by hydrolyzing a silicon alkoxide incorporated with N-methyl-pyrrolidone and silica fine granules, followed by drying and calcination. CONSTITUTION:A silicon alkoxide or its polycondensate is incorporated with 0.1-5.0 molar times of N-methyl-pyrrolidone and silica fine granules and the resultant system is homogeneously dispersed in the presence of a solvent followed by addition of water in the presence of a catalyst to make a hydrolysis, thus preparing a sol solution. Thence this solution is gelled at >=0 deg.C and the resultant gel is left to stand at 0-100 deg.C for several minutes to several tens days to effect drying followed by calcination by heating at a rate of 50-200 deg.C/hr to 1000-1300 deg.C. |
申请公布号 |
JPH0238325(A) |
申请公布日期 |
1990.02.07 |
申请号 |
JP19880189297 |
申请日期 |
1988.07.28 |
申请人 |
HITACHI CHEM CO LTD |
发明人 |
MACHII YOICHI;HAYASHI FUSAJI;TAKEI KOICHI;SHIMAZAKI TOSHIKATSU |
分类号 |
C03B8/02;C03B19/12;C03C1/00 |
主分类号 |
C03B8/02 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|