Magnetic recording medium
US4956220A · kind A · utility
16Cited by
9References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 20, 1987 |
| Grant date | Sep 11, 1990 |
| Priority date | — |
| Expiry date | Mar 20, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2993
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic recording medium with improved output characteristics and durability is provided by using magnetic powder comprising iron-containing particles each of which carries a compound containing aluminum and/or a compound containing silicon in such amounts that, in the whole magnetic powder, a weight ratio of silicon to iron is from 0.010:1 to 0.150:1, a weight ratio of aluminum to iron is from 0.040:1 to 0.150:1, and a weight ratio of aluminum to silicon is from 1:1 to 15:1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.