Ferrite particles for bonded magnet, resin composition for bonded magnet and molded products using the same
US9607741B2 · kind B2 · utility
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2Claims
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Key dates
| Filing date | Apr 18, 2014 |
| Grant date | Mar 28, 2017 |
| Priority date | — |
| Expiry date | Apr 18, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2982
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention relates to ferrite particles for bonded magnet, having a volume-average particle diameter of 2.1 to 2.7 μm and a particle diameter ×90 of 4.3 to 5.4 μm wherein the ×90 represents a particle diameter at which a cumulative percentage of particles under sieve (undersize particles) based on a volume thereof is 90%, when determined from a particle size distribution thereof measured by using a laser diffraction type particle size distribution measuring apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.