Transparent polycrystalline yttrium aluminum garnet
US6844285B1 · kind B1 · utility
21Cited by
6References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 3, 2003 |
| Grant date | Jan 18, 2005 |
| Priority date | — |
| Expiry date | Sep 3, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2235/9661
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A transparent polycrystalline yttrium aluminum garnet (YAG) ceramic is described wherein the ceramic is colorless and transparent in both as-sintered and post-sinter, air-fired states which makes it highly desirable for lamp applications. The transparent YAG ceramic is co-doped with an amount of MgO and an amount of ZrO2 wherein the weight ratio of MgO to ZrO2 is from about 1.5:1 to 3:1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.