Electrical steel sheet
US10519551B2 · kind B2 · utility
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2References
4Claims
0Family size
Assignee
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Key dates
| Filing date | Dec 22, 2015 |
| Grant date | Dec 31, 2019 |
| Priority date | — |
| Expiry date | Jul 30, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C22/74
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
An electrical steel sheet (1) includes a base material (2) of electrical steel, and an insulating film (3) formed on a surface of the base material (2). The insulating film (3) contains a phosphates of one or more selected from the group consisting of Al, Zn, Mg and Ca. The phosphate exhibits a specific peak having a top within a range of −26 ppm to −16 ppm in a solid 31P-NMR spectrum, and a proportion of an integrated intensity of the specific peak relative to an integrated intensity of all peaks in the solid 31P-NMR spectrum is 30% or more.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.