Lead-free glaze and spark plug
US6492289B1 · kind B1 · utility
11Cited by
27References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 23, 2000 |
| Grant date | Dec 10, 2002 |
| Priority date | — |
| Expiry date | May 23, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2111/00844
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A lead-free glaze that can be fired at a low temperature, a spark plug for which it is used, and a spark plug production method are provided. The lead-free glaze is for coating onto ceramic materials. This lead-free glaze contains 16-49 wt % of SiO2, 15-35 wt % of B2O3, 0-10 wt % of Al2O3 and 0-10 wt % of ZnO. A spark plug is provided that comprises coating the lead-free glaze onto the surface of an insulator and firing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.