Ceramic heater
US6236027A · kind A · utility
13Cited by
3References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 27, 2000 |
| Grant date | May 22, 2001 |
| Priority date | — |
| Expiry date | Mar 27, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B2203/027
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
This invention provides a ceramic heater comprising a core, an insulation layer and a resistance heating element of high-melting metal as embedded between the core and insulation layer, wherein the operating temperature is not less than 300.degree. C., the insulation layer comprising a sintered compact composed of 88 to 95 weight % of Al.sub.2 O.sub.3 supplemented with, as sintering aids, 3 to 10 weight % of SiO.sub.2, 0.4 to 1.0 weight % of MgO and 1.0 to 2.5 weight % of CaO and having a density of not less than 3.60 and a thickness of 100 to 300 .mu.m.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.