Corrosion resistant ceramic and a production method thereof
US6200918A · kind A · utility
18Cited by
12References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 15, 1998 |
| Grant date | Mar 13, 2001 |
| Priority date | — |
| Expiry date | Dec 15, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/302
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A TAG, LAG or YbAG anti-corrosion layer of which Si content is 100 ppm or under and total content of Ca and Mg is 200 ppm or under is provided on the internal surface of a tubular YAG base of a discharge envelope. The mean particle size of the anti-corrosion layer is 20 .mu.m or over, and the mean particle size of the base is 15 .mu.m or under.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.