Global Patent Index - EP 0453270 A3

EP 0453270 A3 19911127 - RARE-EARTH BASED MAGNETIC MATERIALS, PRODUCTION PROCESS AND USE

Title (en)

RARE-EARTH BASED MAGNETIC MATERIALS, PRODUCTION PROCESS AND USE

Publication

EP 0453270 A3 19911127 (EN)

Application

EP 91303442 A 19910417

Priority

  • IE 67191 A 19910228
  • IE 135990 A 19910418
  • IE 320190 A 19900904

Abstract (en)

[origin: EP0453270A2] A new magnetic material of the general formula: RxFeyX min aZb is derived from an intermetallic compound of rhomohedral or hexagonal crystal structure wherein R is one or more rare earth elements, X min is an element of groups IIIA, IIIB, IVA or IVB of the periodic table, Z is one or more elements of group VA of the periodic table, x is a value from 1 to 2, y is a value from 11 to 19, a is a value from 0 to 3, b is a value from 0.5 to 3 and Fe is unsubstituted or partly, substitued with the proviso that if the component Z is antimony or bismuth the element X min is not boron. These new materials exhibit increased Curie temperatures, magnetic strength and easy uniaxial anisotropy and are therefore suitable for fabricating into permanent magnets. Processes for preparing materials RxFeyX min aZb are also described.

IPC 1-7

H01F 1/053

IPC 8 full level

C22C 38/00 (2006.01); H01F 1/053 (2006.01); H01F 1/055 (2006.01); H01F 1/057 (2006.01); H01F 1/058 (2006.01); H01F 1/059 (2006.01)

CPC (source: EP)

H01F 1/055 (2013.01); H01F 1/057 (2013.01); H01F 1/058 (2013.01); H01F 1/059 (2013.01)

Citation (search report)

  • [A] US 4402770 A 19830906 - KOON NORMAN C [US]
  • [X] PATENT ABSTRACTS OF JAPAN, vol. 10, no. 11 (E-374)[2068], 17th January 1986; & JP-A-60 176 202 (HITACHI KINZOKU K.K.) 10-09-1985
  • [X] PATENT ABSTRACTS OF JAPAN, vol. 11, no. 117 (E-498)[2564], 11th April 1987; & JP-A-61 263 201 (HITACHI METALS LTD) 21-11-1986
  • [X] PATENT ABSTRACTS OF JAPAN, vol. 14, no. 41 (E-879)[3984], 25th January 1990; & JP-A-1 274 401 (TDK CORP.) 02-11-1989
  • [XD] IEEE TRANSACTIONS ON MAGNETICS, vol. 23, no. 5II, September 1987, pages 3098-3100; S. HIGANO et al.: "Magnetic properties of RE-TM-N system"
  • [A] PATENT ABSTRACTS OF JAPAN, vol. 9, no. 310 (E-364)[2033], 6th December 1985; & JP-A-60 144 909 (DAIDO TOKUSHUKO K.K.) 31-07-1985
  • [XP] NRC HANDELSBLAD, 4th April 1991, NL; "Nieuwe legering ontwikkeld voor permanente magneten"

Designated contracting state (EPC)

AT BE CH DE DK ES FR GB GR IT LI LU NL SE

DOCDB simple family (publication)

EP 0453270 A2 19911023; EP 0453270 A3 19911127; EP 0453270 B1 19960410; AT E136680 T1 19960415; CA 2040686 A1 19911019; DE 69118577 D1 19960515; DE 69118577 T2 19961114; IE 76721 B1 19971105; IE 901359 A1 19911106; JP H06349612 A 19941222; PT 97411 A 19920131

DOCDB simple family (application)

EP 91303442 A 19910417; AT 91303442 T 19910417; CA 2040686 A 19910417; DE 69118577 T 19910417; IE 135990 A 19910418; JP 8663291 A 19910418; PT 9741191 A 19910418