Permanentmagnet und verfahren zu seiner herstellung

Aimant permanent et son procede de production

Permanent magnet and method for preparation thereof

Abstract

A ferrite magnet obtained by adding at least one element selected from the group consisting of Co, Ni, Mn and Zn to a ferrite having a hexagonal M-type magnetoplumbite structure, in which a portion of Sr, Ba, Pb or Ca is replaced with at least one element that is selected from the group consisting of the rare-earth elements (including Y) and Bi and that always includes La, during the fine pulverization process thereof, and then subjecting the mixture to recalcining and/or sintering process(es). By adding a small amount of the element such as Co, Ni, Mn or Zn to the ferrite already having the hexagonal M-type magnetoplumbite structure during the fine pulverization process thereof, the magnetic properties can be improved.

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Patent Citations (5)

    Publication numberPublication dateAssigneeTitle
    EP-0940823-A1September 08, 1999TDK CorporationCorps d'oxyde magnetique, particules de ferrite, aimant agglomere, aimant fritte, procede de fabrication de ces materiaux, et support d'enregistrement magnetique
    EP-0940824-A1September 08, 1999TDK CorporationPoudre d'aimant, aimant fritte, procede de fabrication de ces materiaux, aimant agglomere, moteur, et support d'enregistrement magnetique
    EP-0964411-A1December 15, 1999Hitachi Metals, Ltd.Ferrite magnet and process for producing the same
    EP-1150310-A1October 31, 2001Sumitomo Special Metals Company LimitedPoudre d'aimant de ferrite et aimant utilisant la poudre d'aimant, et procede de preparation de ceux-ci
    EP-1351260-A1October 08, 2003Sumitomo Special Metals Company LimitedPermanent magnet and method for preparation thereof

NO-Patent Citations (2)

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    See also references of WO 02063642A1

Cited By (5)

    Publication numberPublication dateAssigneeTitle
    EP-1351260-A1October 08, 2003Sumitomo Special Metals Company LimitedPermanent magnet and method for preparation thereof
    EP-1351260-A4April 26, 2006Neomax Co LtdPermanentmagnet und verfahren zu seiner herstellung
    EP-2172770-A1April 07, 2010Delphi Technologies, Inc.Sensor material and gas sensor element and gas sensor derived therefrom
    EP-2916329-A3November 11, 2015TDK CorporationSintered ferrite magnet and motor provided therewith
    US-7964072-B2June 21, 2011Delphi Technologies, Inc.Sensor material and gas sensor element and gas sensor derived therefrom