Magnetic ferrite material and manufacture method thereof
US6402979B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 28, 2000 |
| Grant date | Jun 11, 2002 |
| Priority date | — |
| Expiry date | Aug 22, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B35/2658
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
There is disclosed a magnetic ferrite material obtained by calcining a raw material, forming a calcined powder into a desired shape and sintering to contain Fe2O3, MnO and ZnO as main components, the magnetic ferrite material with a low power loss is realized by setting the coefficient of variation (CV value) of the content of a Ca component precipitated along a grain boundary in a range of 1 to 60%, and the magnetic ferrite material is manufactured by calcining the raw material containing Fe2O3, MnO and ZnO as the main components to obtain the calcined powder in which that the S component content is in a range of 1 to 200 ppm, and forming the calcined powder into the desired shape and sintering.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.