Glass-encapsulated magnetic materials and methods for making them
US4360441A · kind A · utility
12Cited by
9References
11Claims
0Family size
Assignee
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Key dates
| Filing date | Jun 25, 1981 |
| Grant date | Nov 23, 1982 |
| Priority date | — |
| Expiry date | Jun 25, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C10/0081
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Magnetic materials exhibiting ferrimagnetic and/or superparamagnetic behavior, produced by impregnating porous glasses with iron and, optionally, manganese, cobalt and nickel compounds, reacting the compounds with the porous glass to form bound complexes, heating the glass to expel unreacted organometallics, and further heating to convert the bound complexes to ferrimagnetic and/or superparamagnetic oxide crystallites, are described. Ferrimagnetic iron oxide crystallites exhibiting coercivities above 10,000 Oe can be made.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.