Method of insulating a magnetic lamination
US5558724A · kind A · utility
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3Claims
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Key dates
| Filing date | Sep 11, 1995 |
| Grant date | Sep 24, 1996 |
| Priority date | — |
| Expiry date | Sep 11, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C22/78
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method for making a lamination insulated by iron-manganese phosphate comprises the following operations: PA1 1. The lamination is treated with an acid or basic medium to eliminate the surface layer of the lamination that contains excess silicon and aluminum. PA1 2. The lamination is rinsed. PA1 3. The lamination is brought into contact with a solution of phosphoric acid containing iron phosphate and manganese phosphate for sufficient time to obtain an insulative layer of the required thickness.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.