Heat-resistant composite magnet and method for producing the same
US4264361A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | May 8, 1979 |
| Grant date | Apr 28, 1981 |
| Priority date | — |
| Expiry date | May 8, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F1/083
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
This invention relates to a heat-resistant composite magnet comprising 2 to 30% by weight of an organic-inorganic compound binder containing boron and silicon and 70 to 98% by weight of the powder of one or more permanent magnets. This invention further relates to a method for producing a heat-resistant composite magnet, which comprises the steps of (a) adding the powder of one or more permanent magnets to a solution of an organic-inorganic compound binder containing boron and silicon dissolved in an organic solvent; (b) evaporating said solvent; (c) molding the resultant permanent magnet powder covered with said binder under a pressure of 0.1 to 5 tons/cm.sup.2 in the presence or in the absence of a magnetic field of 12,000-5,000 oersted, the molded product being heated at 200.degree.-450.degree. C. during the molding or after the molding; and (d) cooling the molded product. This invention still further relates to a method for producing a heat-resistant composite magnet, which comprises the steps of (a) molding the powder of one or more permanent magnet at room temperature under a pressure of 0.1 to 5 tons/cm.sup.2 in the presence or in the absence of a magnetic field of 12,000-5,…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.