Patent EP0530159A2 successfully refreshed from Google Patents.
EP0101552A2
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Magnetic materials, permanent magnets and methods of making those
Assignee: Proterial Ltd
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Filing: 1983-07-05
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Granted: —
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Expires: 2003-07-05
Abstract
Abstract Magnetic materials comprising Fe, B and R (rare earth elements) having a major phase of Fe-B-R intermetallic compound(s) of tetragonal system, and sintered anisotropic permanent magnets consisting essentially of, by atomic percent, 8-30% R (at least one of rare earth elements inclusive of Y), 2-28% B and the balance being Fe with impurities. Those may contain additional elements M (Ti, Ni, Bi, V, Nb, Ta, Cr, Mo, W, Mn. AI, Sb, Ge, Sn, Zr, Hf) providing Fe-B-R-M type materials and magnets.
Inventors
- 👤 Masato Sagawa
- 👤 Setsuo Hanazonodanchi 14-106 Fujimura
- 👤 Yutaka Matsuura
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 16:21
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/032; H01F1/04; H01F1/047; H01F1/053; H01F1/055; H01F1/057; H01F1/0571; H01F1/0575; H01F1/0577
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
46 words
A magnetic material comprising Fe, B and R wherein R is at least one rare earth element including Y, and in which a major phase is formed of at least one intermetallic compound of the Fe-B-R type having a crystal structure of the substantially tetragonal system.
Claim 2
Dependent Claim
46 words
A magnetic material comprising Fe, B and R wherein R is at least one rare earth element including Y, and in which a major phase is formed of at least one intermetallic compound of the Fe-B-R type having a crystal structure of the substantially tetragonal system.
Claim 3
Dependent Claim
50 words
A sintered magnetic material having a major phase formed of at least one intermetallic compound consisting essentially of, by atomic percent, 8 - 30 percent R wherein R is at least one of rare earth element including Y, 2 - 28 percent B and the balance being Fe with impurities.
Claim 4
Dependent Claim
50 words
A sintered magnetic material having a major phase formed of at least one intermetallic compound consisting essentially of, by atomic percent, 8 - 30 percent R wherein R is at least one of rare earth element including Y, 2 - 28 percent B and the balance being Fe with impurities.
Claim 5
Dependent Claim
55 words
A sintered magnetic material having a major phase formed of at least one intermetallic compound of the substantially tetragonal system, and consisting essentially of, by atomic percent, 8 - 30 percent R, wherein R is at least one rare earth element including Y, 2 - 28 percent B and the balance being Fe with impurities.
Claim 6
Dependent Claim
55 words
A sintered magnetic material having a major phase formed of at least one intermetallic compound of the substantially tetragonal system, and consisting essentially of, by atomic percent, 8 - 30 percent R, wherein R is at least one rare earth element including Y, 2 - 28 percent B and the balance being Fe with impurities.
Claim 7
Dependent Claim
39 words
A sintered anisotropic permanent magnet consisting essentially of, by atomic percent, 8 - 30 percent R wherein R is at least one rare earth element including Y, 2 - 28 percent B and the balance being Fe with impurities.
Claim 8
Dependent Claim
39 words
A sintered anisotropic permanent magnet consisting essentially of, by atomic percent, 8 - 30 percent R wherein R is at least one rare earth element including Y, 2 - 28 percent B and the balance being Fe with impurities.
Claim 9
Dependent Claim
64 words
A sintered anisotropic permanent magnet having a major phase formed of at least one intermetallic compound of the Fe-B-R type having a crystal structure of the substantially tetragonal system, and consisting essentially of, by atomic percent 8 - 30 percent R wherein R is at least one rare earth element including Y, 2 - 28 percent B and the balance being Fe with impurities.
Claim 10
Dependent Claim
64 words
A sintered anisotropic permanent magnet having a major phase formed of at least one intermetallic compound of the Fe-B-R type having a crystal structure of the substantially tetragonal system, and consisting essentially of, by atomic percent 8 - 30 percent R wherein R is at least one rare earth element including Y, 2 - 28 percent B and the balance being Fe with impurities.
Claim 11
Dependent Claim
24 words
A magnetic material as defined in Claim 1 or 3, in which the substantially tetragonal system amounts to no less than 50 vol %.
Claim 12
Dependent Claim
22 words
A permanent magnet as defined in Claim 5, in which the substantially tetragonal system amounts to no less than 50 vol %.
Claim 13
Dependent Claim
21 words
A permanent magnet as defined in Claim 7, which contains no less than 1 vol % of nonmagnetic intermetallic compound phases.
Claim 14
Dependent Claim
23 words
A permanent magnet as defined in Claim 4 or 5, in which the mean crystal grain size is 1 to 80. A m.
Claim 15
Dependent Claim
19 words
A permanent magnet as defined in Claim 9, in which the mean crystal grain size is 2 to 40µm.
References Cited (Backward Citations)
No citation records indexed.
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