EP 3522178 A1 20190807 - RARE EARTH MAGNET AND PRODUCTION METHOD THEREOF
Title (en)
RARE EARTH MAGNET AND PRODUCTION METHOD THEREOF
Title (de)
SELTENERDMAGNET UND HERSTELLUNGSVERFAHREN DAFÜR
Title (fr)
AIMANT LIÉ AUX TERRES RARES ET PROCÉDÉ DE PRODUCTION ASSOCIÉ
Publication
Application
Priority
- JP 2017254475 A 20171228
- JP 2018151433 A 20180810
- JP 2018221584 A 20181127
Abstract (en)
[SUMMARY][PROBLEM TO BE SOLVED]To provide a rare earth magnet protected from reduction in the coercive force at high temperatures and a production method thereof.[MEANS TO SOLVE THE PROBLEM]A rare earth magnet comprising a main phase and a grain boundary phase present around the main phase, wherein: the overall composition is represented by the formula: (Nd(Ce, La)Ry)Fe)CoBMs·(RRM), wherein Ris one or more members selected from rare earth elements other than N, Ce and La, Ris one or more members selected from Pr, Nd, Pm, Sm, Eu and Gd, Ris one or more members selected from rare earth elements other than R, Mand Mare a predetermined element, 5.0≤p≤20.0, 0≤q≤8.0, 4.0≤r≤6.5, 0≤s≤2.0, 0≤t≤10.0, 0.4≤x≤0.8, 0≤y≤0.1, 0.5≤z≤0.8, and 0≤w≤0.1 and La is contained in an amount of 1/9 to 3 times by molar ratio relative to Ce.
IPC 8 full level
H01F 1/057 (2006.01); H01F 41/02 (2006.01)
CPC (source: BR CN EP KR RU)
B22F 3/14 (2013.01 - CN); B22F 9/04 (2013.01 - CN); C22C 38/002 (2013.01 - CN); C22C 38/005 (2013.01 - CN); C22C 38/007 (2013.01 - CN); C22C 38/04 (2013.01 - CN); C22C 38/06 (2013.01 - CN); C22C 38/10 (2013.01 - CN); C22C 38/16 (2013.01 - CN); C22C 38/32 (2013.01 - CN); H01F 1/053 (2013.01 - RU); H01F 1/057 (2013.01 - RU); H01F 1/0572 (2013.01 - KR); H01F 1/0576 (2013.01 - CN EP KR); H01F 1/0577 (2013.01 - BR CN); H01F 41/02 (2013.01 - RU); H01F 41/0266 (2013.01 - KR); H01F 41/0273 (2013.01 - CN); H01F 41/0293 (2013.01 - KR); B22F 2009/048 (2013.01 - CN); C22C 2202/02 (2013.01 - KR); H01F 1/0571 (2013.01 - EP); H01F 41/0293 (2013.01 - EP)
Citation (applicant)
WO 2014196605 A1 20141211 - TOYOTA MOTOR CO LTD [JP]
Citation (search report)
- [XI] US 6136099 A 20001024 - AKIOKA KOJI [JP], et al
- [ID] US 2016141083 A1 20160519 - ITO MASAAKI [JP], et al
- [I] JP 2016111136 A 20160620 - TOYOTA MOTOR CORP
- [A] US 5129963 A 19920714 - PANCHANATHAN VISWANATHAN [US], et al
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
EP 3522178 A1 20190807; EP 3522178 B1 20220223; BR 102018077206 A2 20190716; CN 109979699 A 20190705; CN 109979699 B 20211022; KR 102156629 B1 20200916; KR 20190080748 A 20190708
DOCDB simple family (application)
EP 18215888 A 20181224; BR 102018077206 A 20181227; CN 201811619581 A 20181228; KR 20180160146 A 20181212