Electrical insulating refractory composition
US4415674A · kind A · utility
3Cited by
1References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 12, 1982 |
| Grant date | Nov 15, 1983 |
| Priority date | — |
| Expiry date | Apr 12, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01B3/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Sheathed electrical heating elements containing MgO heat conductive, electrical insulating material having an additive of fine particles of spherically shaped fused ZrO.sub.2 to increase the electrical resistivity and maintain favorable tap density and flow properties. The spherically shaped ZrO.sub.2 particles are formed by gravitationally separating the ZrO.sub.2 particles from ground fused zircon (ZrO.sub.2.SiO.sub.2).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.