Glass compositions containing oxygen and nitrogen and production of nitroceramics/vetroceramics composites therefrom
US5166102A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 18, 1990 |
| Grant date | Nov 24, 1992 |
| Priority date | — |
| Expiry date | Oct 18, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C2214/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Glass compositions containing oxygen and nitrogen prepared by melting admixture of magnesia and/or a magnesium silicate, silica and an aluminum nitride produced by reacting ammonia with aluminum oxide, have the formula: EQU Mg.sub.x Si.sub.y Al O.sub.u N.sub.v (1) in which 0.25.ltoreq.x.ltoreq.2.50, 1.25.ltoreq.y.ltoreq.3.50, 3.75.ltoreq.u.ltoreq.10.50, and 0.05.ltoreq.v.ltoreq.0.75, with the proviso that 2x+4y+3=2u+3v; the subject glass compositions are thermally converted into vitroceramics having the same formula and including a single cordierite crystalline phase, which vitroceramics are well adapted for the production of composite shaped articles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.