Spindle-like magnetic iron oxide particles and process for producing the same
US4873010A · kind A · utility
14Cited by
6References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 15, 1987 |
| Grant date | Oct 10, 1989 |
| Priority date | — |
| Expiry date | Apr 15, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/70652
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Disclosed herein are magnetic iron oxide particles comprising spindle-like magnetite or maghemite particles having an aspect ratio(major:minor) of less than 4:1 and containing 0.1 to 20 atomic % of Si to Fe, and a process for producing the same.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.