Frit seal material, lamp with frit seal, and method for sealing a high intensity discharge lamp
US7936128B2 · kind B2 · utility
0Cited by
9References
13Claims
0Family size
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Key dates
| Filing date | Jul 28, 2008 |
| Grant date | May 3, 2011 |
| Priority date | — |
| Expiry date | Apr 22, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2237/343
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A high intensity discharge lamp includes an arc tube with a chemical fill, capillaries extended from the arc tube, electrodes fed through the capillaries into the arc tube, and a frit seal that seals the capillaries, where the frit seal includes silica (SiO2) in a range of more than 0 wt % to less than 5 wt %, alumina (Al2O3), and one of dysprosia (Dy2O3) and yttrium oxide (Y2O3). This frit seal material can withstand a higher operating temperature so that the length of the capillaries can be reduced compared to those sealed with conventional frit seal material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.