Discharge lamp electrode
US6172453A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 17, 1994 |
| Grant date | Jan 9, 2001 |
| Priority date | — |
| Expiry date | Nov 17, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/78
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention provides an electrode for a ceramic electrode fluorescent discharge lamp; an electrode material for a discharge lamp, which has high electron flow density, high thermal shock resistance, and reduced deterioration due to sputtering; and also a method for manufacturing the same. The invention makes it possible to reduce the tube diameter of the ceramic electrode fluorescent discharge lamp. An electrode material for a discharge lamp is obtained from a first component of 0.5 to 1.5 mols of BaO, CaO or SrO, a second component of 0.05 to less than 0.3 mols or more than 0.7 to 0.95 mols of ZrO.sub.2 or TiO.sub.2, and a third component of 0.025 to less than 0.3 mols of V.sub.2 O.sub.5, Nb.sub.2 O.sub.5, Ta.sub.2 O.sub.5, Sc.sub.2 O.sub.3, Y.sub.2 O.sub.3, La.sub.2 O.sub.3, Dy.sub.2 O.sub.3, or Ho.sub.2 O.sub.3, or 0.05 to less than 0.15 mols or more than 0.35 to 0.95 mols of HfO.sub.2, CrO.sub.3, MoO.sub.3 or WO.sub.3. This electrode material is granulated and is turned into a massive, granular, or porous electrode material. This is placed in a cylindrical semiconductor ceramic container with a closed bottom and is reduced and fired to prepare an electrode. A mercury …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.