Glass-ceramic Li-Al-Si-O composition and process for its production
US5232877A · kind A · utility
3Cited by
9References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 30, 1992 |
| Grant date | Aug 3, 1993 |
| Priority date | — |
| Expiry date | Mar 30, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C2214/32
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
In the process according to the invention, a gel is prepared by hydrolysis and polycondensation of precursor compounds which comprise at least silicon alcoholate and aluminum alcoholate and inorganic compounds of lithium and/or magnesium, the solvent is removed, and the gel obtained is subjected to a heat treatment resulting in dehydration and oxidation, then to compacting and ceramisization. The composition obtained is substantially in the form of solid ceramic solutions, such as .beta.-spodumene, cordierite and mullite.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.