Method for forming a heat-resistant insulating film on a grain oriented silicon steel sheet
US4113530A · kind A · utility
2Cited by
5References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 18, 1977 |
| Grant date | Sep 12, 1978 |
| Priority date | — |
| Expiry date | Jan 18, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C24/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A uniform and high adhesive heat-resistant insulating film can be formed on a silicon steel sheet by applying an annealing separator consisting mainly of magnesia and containing 1-10% of titanium oxide having such a particle size that at least 99.5% of the agglomerated particles passes through 325-mesh sieve and having a dispersion degree in water of at least 85%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.