Global Patent Index - EP 0425469 B1

EP 0425469 B1 2000-04-05 - Permanent magnet (material) and production process

Title (en)

Permanent magnet (material) and production process

Title (de)

Permanentmagnet(-werkstoff) sowie Verfahren zur Herstellung desselben

Title (fr)

(Matériau pour) Aimant permanent et procédé de fabrication

Publication

EP 0425469 B1 (DE)

Application

EP 90890267 A

Priority

AT 245489 A

Abstract (en)

[origin: EP0425469A2] The invention relates to a sintered SE-Fe-B permanent magnetic material and a process for its production. According to the invention, to improve the magnetic characteristics, it is intended to add or incorporate, as an additional alloy component, at least one further element from the group consisting of the heavy rare earth metals, for example dysprosium and/or terbium, and/or at least one oxide and/or nitride and/or carbide of at least one element from the group consisting of the rare earth metals at or in the grain boundaries and/or in the grain boundary region of the magnetic phase, preferably SE2Fe14B, where SE is at least one element from the group consisting of the rare earth metals, for example neodymium and/or dysprosium and/or holmium. Table 1 <IMAGE>

IPC 1-7 (main, further and additional classification)

H01F 1/053; H01F 41/02

IPC 8 full level (invention and additional information)

H01F 1/00 (2006.01); H01F 1/053 (2006.01); H01F 1/057 (2006.01)

CPC (invention and additional information)

H01F 1/0577 (2013.01); H01F 41/0293 (2013.01)

Designated contracting state (EPC)

BE CH DE FR GB IT LI NL SE

EPO simple patent family

EP 0425469 A2 19910502; EP 0425469 A3 19911106; EP 0425469 B1 20000405; AT 393178 B 19910826; AT A245489 A 19910115; CS 9005141 A3 19920513; CZ 284167 B6 19980916; DD 298177 A5 19920206; DE 59010911 D1 20000921; HU 215659 B 19990201; HU 906544 D0 19910429; HU T58948 A 19920330

INPADOC legal status


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