Magnetic material and manufacturing method thereof, and bonded magnet using the same
US6416593B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 16, 2001 |
| Grant date | Jul 9, 2002 |
| Priority date | — |
| Expiry date | Aug 16, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F1/059
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A magnetic material has a composition expressed by the following general formula,general formula:{(R1XR21-X)YBZT1-Y-Z}1-QNQ (where, R1 is at least one kind of element selected from rare earth elements, R2 is at least one kind of element selected from Zr, Hf, Ti and Sc, T is at least one kind of element selected from Fe and Co, and X, Y, Z and Q designate numerical values satisfying 0.5≦X<1, 0.05≦Y≦0.2, 0≦Z≦0.1 and 0.1≦Q≦0.2), and includes 5 volume % or more of a Th2Ni17 crystal phase. The magnetic material has a recrystallization texture of which average grain diameter is in the range of from 0.02 to 50 &mgr;m, and is excellent in magnetic property. Such a magnetic material is obtained by giving a HDDR treatment to a mother alloy of which principal phase is a Th2Ni17 crystal phase.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.