Procedure for preparing a incandescent material and its use in hard mantles for gas lighting of public places
US5904881A · kind A · utility
0Cited by
13References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 7, 1998 |
| Grant date | May 18, 1999 |
| Priority date | — |
| Expiry date | Apr 7, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21H1/02
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a incandescent material formed from the following mixture of oxides (in moles): PA1 50 to 70% zirconium oxide ZrO.sub.2, PA1 5 to 8% yttrium oxide Y.sub.2 O.sub.3, PA1 13 to 20% magnesium oxide MgO, PA1 4 to 10% lithium oxide Li.sub.2 O, and PA1 0.2 to 0.6% cerium oxide CeO.sub.2, PA1 0 to 25% potassium oxide K.sub.2 O, PA1 0 to 1% tungsten oxide WO.sub.3. This material is suitable for producing hard mantles for gas lighting of public places.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.