Magnetic head having high wear resistance and non-magnetic substrate used in the magnetic head
US5404259A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Oct 26, 1992 |
| Grant date | Apr 4, 1995 |
| Priority date | — |
| Expiry date | Oct 26, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S428/90
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In order to improve a wear resistance and recording and reproducing properties of a magnetic head which has a magnetic core having a magnetic gap and a penetrated hole, a pair of reinforcing members holding the magnetic core therebetween, each having an opening corresponding to the penetrated hole, and a winding wound onto the magnetic core and the reinforcing members through the penetrated hole and the opening, each of the reinforcing member is a non-magnetic substrate which is made of a ceramic material essentially consisting of 2-30 weight % CaO, 2-50 weight % TiO.sub.2, and 30-80 weight % NiO and having an average grain size of 2 .mu.m or less. Alternatively, another ceramic is used which essentially consists of 2-30 weight % CaO, 2-50 weight % TiO.sub.2, 30-80 weight % NiO, and 0.2-1 weight % Al.sub.2 O.sub.3, and having an average grain size of 2 .mu.m or less, excluding zero.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.