Title:
FERRITE MAGNET AND MANUFACTURE OF POWDER THEREOF
Document Type and Number:
Japanese Patent JP3506174
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an Sr ferrite magnet having excellent magnetic characteristic and a manufacturing method of powder of the magnet.
SOLUTION: An Sr ferrite magnet has practically a magneto plumbite type crystal structure. A part of Sr site is substituted by at least one kind out of La, Nd and Pr, and a part of Fe site is substituted by at least one kind out of Mn, Co and Ni. In a manufacturing method of the above Sr ferrite magnet, at least one kind of compound out of La, Nd and Pr and at least one kind of compound out of Mn, Co and Ni are mixed with carbonate of Sr whose compounding ratio is shown by SrO/nFe2O3 (where n is mole ratio) and iron oxide, and calcination is performed. The calcined object is smashed. Molding is performed in a magnetic field by using the obtained smashed powder, and then sintering is performed.
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Inventors:
Yutaka Kubota
Hiroshi Iwasaki
Yasunobu Ogata
Hiroshi Iwasaki
Yasunobu Ogata
Application Number:
JP2000108584A
Publication Date:
March 15, 2004
Filing Date:
November 18, 1996
Export Citation:
Assignee:
Hitachi Metals Co., Ltd.
International Classes:
C01G49/00; H01F1/11; C01G51/00; C01G53/00; C04B35/26; C04B35/40; H01F41/02; (IPC1-7): H01F1/11; C01G49/00; C04B35/26; H01F41/02
Other References:
【文献】特許2922864(JP,B2)
【文献】特許3266187(JP,B2)
【文献】特許3266187(JP,B2)
Attorney, Agent or Firm:
Takaishi Tachibana