WO2009041606A1 - ボンド磁石用フェライト粉末およびその製造方法、並びに、これを用いたボンド磁石 - Google Patents

ボンド磁石用フェライト粉末およびその製造方法、並びに、これを用いたボンド磁石 Download PDF

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Publication number
WO2009041606A1
WO2009041606A1 PCT/JP2008/067472 JP2008067472W WO2009041606A1 WO 2009041606 A1 WO2009041606 A1 WO 2009041606A1 JP 2008067472 W JP2008067472 W JP 2008067472W WO 2009041606 A1 WO2009041606 A1 WO 2009041606A1
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Prior art keywords
bonded magnets
size distribution
particle size
powder
ferrite powder
Prior art date
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PCT/JP2008/067472
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English (en)
French (fr)
Inventor
Kazuyuki Nakaue
Shinichi Suenaga
Masahiro Kojima
Hiroya Ikeda
Satoru Tsuboi
Original Assignee
Dowa Electronics Materials Co., Ltd.
Dowa F-Tec Co., Ltd.
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Publication date
Application filed by Dowa Electronics Materials Co., Ltd., Dowa F-Tec Co., Ltd. filed Critical Dowa Electronics Materials Co., Ltd.
Priority to EP08833553.4A priority Critical patent/EP2204352B1/en
Priority to US12/733,854 priority patent/US8337714B2/en
Priority to KR1020107009282A priority patent/KR101515251B1/ko
Priority to CN2008801086801A priority patent/CN101808943B/zh
Publication of WO2009041606A1 publication Critical patent/WO2009041606A1/ja

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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/60—Aspects relating to the preparation, properties or mechanical treatment of green bodies or pre-forms
    • C04B2235/605—Making or treating the green body or pre-form in a magnetic field
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/74—Physical characteristics
    • C04B2235/76—Crystal structural characteristics, e.g. symmetry
    • C04B2235/767—Hexagonal symmetry, e.g. beta-Si3N4, beta-Sialon, alpha-SiC or hexa-ferrites
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/74—Physical characteristics
    • C04B2235/77—Density
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]

Abstract

　流動性や圧縮密度を得るため粒度分布幅を広くしながらも、それによるＳＦＤの増加を抑制し、配向性や着磁性の低下を抑制できるボンド磁石用フェライト粉末を提供する。平均粒子径が０.２０μｍ以上、５．００μｍ未満の範囲にあり、Ｚｒ、Ｔｉ、Ｚｎ、Ｃｏ、Ｍｎ及びＮｉからなる群より選ばれた少なくとも１種以上の遷移金属の酸化物を含有するマグネトプランバイト型フェライト粉であって、レーザー回折式粒度分布測定装置によって求めた当該マグネトプランバイト型フェライト粉の粒度分布において、粒子径１μｍ以下の粒子の割合が２０質量％以上あるボンド磁石用フェライト粉末を製造した。
PCT/JP2008/067472 2007-09-28 2008-09-26 ボンド磁石用フェライト粉末およびその製造方法、並びに、これを用いたボンド磁石 WO2009041606A1 (ja)

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EP08833553.4A EP2204352B1 (en) 2007-09-28 2008-09-26 Ferrite powder for bonded magnets, process for the production of the powder, and bonded magnets made by using the same
US12/733,854 US8337714B2 (en) 2007-09-28 2008-09-26 Ferrite powders for bonded magnet, process for the production of the powders, and bonded magnet made by using the same
KR1020107009282A KR101515251B1 (ko) 2007-09-28 2008-09-26 본드 자석용 페라이트 분말 및 이의 제조 방법, 및 이를 이용한 본드 자석
CN2008801086801A CN101808943B (zh) 2007-09-28 2008-09-26 粘结磁体用铁氧体粉末及其制造方法、及使用其的粘结磁体

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US20100295643A1 (en) 2010-11-25
KR101515251B1 (ko) 2015-04-24
US8337714B2 (en) 2012-12-25
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