Preparation of oxide magnetic material and oxide magnetic material
US6908568B2 · kind B2 · utility
4Cited by
8References
18Claims
0Family size
Assignee
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Key dates
| Filing date | Jun 17, 2002 |
| Grant date | Jun 21, 2005 |
| Priority date | — |
| Expiry date | Aug 26, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2235/767
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An oxide magnetic material is prepared by wet molding in a magnetic field a slurry containing a particulate oxide magnetic material, water and a polyhydric alcohol having the formula: Cn(OH)nHn+2 wherein n is from 4 to 100 as a dispersant. By improving the orientation in a magnetic field upon wet molding using water, an oxide magnetic material having a high degree of orientation, typically an anisotropic ferrite magnet, is obtained at a high rate of productivity. The method is advantageous from the environmental and economical standpoints.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.