Process for preparing magnetic oxides
US4145301A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 1, 1976 |
| Grant date | Mar 20, 1979 |
| Priority date | — |
| Expiry date | Nov 1, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F1/0009
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
This invention relates to a process for the preparation of magnetic oxides and possibly of at least one other metal. It relates also to new products consisting in mono- and polymetal magnetic oxides. According to the invention a glycerin complex of iron and possibly at least one other metal is first prepared and the complex is decomposed into a mono- or polymetal magnetic oxide by hydrolysis or pyrolysis, the possibly decomposed glycerin complex being subjected to a thermal treatment, such as annealing or pyrolysis in an atmosphere of an inert gas, such as nitrogen. The invention relates to magnetic oxides containing 0.2 to 3% by weight of carbon, said oxides preferably containing cobalt and possibly a rare earth element such as yttrium or europium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.