Process for producing glass
US5008219A · kind A · utility
11Cited by
1References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 11, 1989 |
| Grant date | Apr 16, 1991 |
| Priority date | — |
| Expiry date | Dec 11, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S65/901
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention relates to a sol-gel glass producing process which comprises hydrolyzing a metal alkoxide in the presence of an organic solvent and an aqueous ammonia solution to obtain a sol solution, concentrating the sol solution to 1.00-1.95 times the volume of the metal alkoxide used, adding an acid catalyst to the resulting concentrate to allow the concentrate to gel, drying the resulting gel, and heating the dried gel to obtain a desired glass. According to the present invention, a large sized glass can be obtained without the formation of cracks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.