Hexagonal ferrite magnetic powder and method of manufacturing the same, and magnetic recording medium and method of manufacturing the same
US8883329B2 · kind B2 · utility
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6References
16Claims
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Key dates
| Filing date | Jun 1, 2010 |
| Grant date | Nov 11, 2014 |
| Priority date | — |
| Expiry date | Dec 1, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2982
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An aspect of the present invention relates to a hexagonal ferrite magnetic powder manufactured by a glass crystallization method as well as having an average plate diameter ranging from 15 to 25 nm, an average plate ratio ranging from 2.0 to 2.8 and a coercive force (Hc) ranging from 159 to 279 kA/m.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.