KR20030025229A - 산화물 자성재료 - Google Patents
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Abstract
Description
Jr(T) | Hcj(kA/m) | |
Co3O4 | 0.427 | 299 |
수산화코발트(2가) | 0.429 | 311 |
수산화코발트(3가) | 0.430 | 315 |
Jr(T) | Hcj(kA/m) | |
폴리카본산암모니아(넣음) | 0.432 | 286 |
폴리카몬산암모니아(넣지 않음) | 0.427 | 299 |
Claims (15)
- 육방정의 M형 마그네트 플럼바이트 구조를 가지는 페라이트를 주상으로 하는 산화물 자성재료로서,Sr, Ba, Pb 및 Ca로 되는 군에서 선택되는 적어도 1종의 원소로 구성되는 A,Y(이트륨), 희토류원소 및 Bi로 되는 군에서 선택되는 적어도 1종의 원소인 R,Fe 및 B(붕소)를 포함하고,A, R, Fe 및 B의 각각의 구성비율이 상기의 A, R, Fe 및 B의 총원소량에 대하여,A: 7.04원자% 이상 8.68원자% 이하,R: 0.07원자% 이상 0.44원자% 이하,Fe: 90.4원자% 이상 92.5원자% 이하,B: 0.015원자% 이상 0.87원자% 이하,의 관계를 만족하는 산화물 자성재료.
- 식 (1-x)AO·(x/2)R2O3·n(Fe2O3)·y(B2O3)로 표현되고,0.01≤x≤0.05,0.001≤y≤0.05,5.2≤n≤6.2인 제1항에 기재된 산화물 자성재료.
- 제1항 또는 제2항에 기재된 산화물 자성재료를 포함하는 페라이트 자석분말.
- 제3항에 기재된 페라이트 자석분말로 형성되는 소결자석으로, CaO, SiO2, CoO, Cr2O3, Al2O3, SrO 및 BaO를 포함하고, 각각의 첨가량이,CaO : 0.3중량% 이상 1.5중량% 이하,SiO2: 0.2중량% 이상 1.0중량% 이하,CoO : 0중량% 이상 0.4중량% 이하,Cr2O3: 0중량% 이상 5.0중량% 이하,Al2O3: 0중량% 이상 5.0중량% 이하,SrO : 0중량% 이상 3.0중량% 이하,BaO : 0중량% 이상 3.0중량% 이하인 소결자석.
- SrCO3, BaCO3, PbO 및 CaCO3로 되는 군에서 선택되는 적어도 1종의 원료분말과, Y의 산화물, 희토류원소의 산화물 및 Bi2O3로 되는 군에서 선택되는 적어도 1종의 산화물의 원료분말과, Fe2O3(산화철)의 원료분말과, B2O3또는 H3BO3의 원료분말을 혼합하는 것에 의하여 제조되는 원료혼합분말을 준비하는 공정과,상기 원료혼합분말을 1100℃ 이상 1300℃ 이하의 온도에서 가소하고, 이것에 의하여,식 (1-x)AO·(x/2)R2O3·n(Fe2O3)·y(B2O3) (A는 Sr, Ba, Pb 및 Ca로 되는 군에서 선택되는 적어도 1종의 원소, R은 Y를 포함하는 희토류원소 및 Bi로 되는 군에서 선택되는 적어도 1종의 원소, 0.01≤x≤0.05, 0.001≤y≤0.05, 5.2≤n≤6.2)의 조성을 가지는 페라이트 가소체를 형성하는 공정을 포함하는 페라이트 가소체의 제조방법.
- 제5항에 있어서, 공기투과법으로 측정한 상기 Fe2O3(산화철)의 원료분말의 입경이 0.5㎛ 이상 0.8㎛ 이하로 되는 페라이트 가소체의 제조방법.
- 제5항 또는 제6항에 기재된 페라이트 가소체의 제조방법에 의하여 형성되는 가소체에 대하여, CaCO3, SiO2, CoO, 수산화코발트, Cr2O3, Al2O3, SrCO3및 BaCO3(CaCO3: 0.3중량% 이상 1.5중량% 이하, SiO2: 0.2중량% 이상 1.0중량% 이하, CoO : 0중량% 이상 0.4중량% 이하, 수산화코발트 : 0중량% 이상 0.4중량% 이하, Cr2O3: 0중량% 이상 5.0중량% 이하, Al2O3: 0중량% 이상 5.0중량% 이하, SrCO3: 0중량% 이상 3.0중량% 이하, BaCO3: 0중량% 이상 3.0중량% 이하)를 첨가한 가소체 혼합물 분말을 준비하는 공정과,상기 가소체 혼합분말을 분쇄하고, 공기투과법으로 측정한 평균입도가 0.5㎛ 이상 1.5㎛ 이하의 범위내에 있는 페라이트 분쇄분말을 형성하는 공정을 포함하는 자석분말의 제조방법.
- 제7항에 있어서, 공기투과법으로 측정한 상기 페라이트 분쇄분말의 평균입도를 0.8㎛ 이상 1.3㎛ 이하의 범위내로 하는 자석분말의 제조방법.
- SrCO3, BaCO3, PbO 및 CaCO3로 되는 군에서 선택되는 적어도 1종의 원료분말과, Y의 산화물, 희토류원소의 산화물 및 Bi2O3로 되는 군에서 선택되는 적어도 1종의 산화물의 원료분말과, Fe2O3(산화철)의 원료분말과, B2O3또는 H3BO3의 원료분말을 혼합하는 것에 의하여 제조되는 원료혼합분말을 준비하는 공정과,상기 원료혼합분말을 1100℃ 이상 1300℃ 이하의 온도에서 가소하고, 이것에 의하여,식 (1-x)AO·(x/2)R2O3·n(Fe2O3)·y(B2O3) (A는 Sr, Ba, Pb 및 Ca로 되는 군에서 선택되는 적어도 1종의 원소, R은 Y를 포함하는 희토류원소 및 Bi로 되는 군에서 선택되는 적어도 1종의 원소, 0.01≤x≤0.05, 0.001≤y≤0.05, 5.2≤n≤6.2)의 조성을 가지는 페라이트 가소체를 형성하는 공정과,상기 페라이트 가소체에 대하여, CaCO3, SiO2, CoO, 수산화코발트, Cr2O3,Al2O3, SrCO3및 BaCO3(CaCO3: 0.3중량% 이상 1.5중량% 이하, SiO2: 0.2중량% 이상 1.0중량% 이하, CoO : 0중량% 이상 0.4중량% 이하, 수산화코발트 : 0중량% 이상 0.4중량% 이하, Cr2O3: 0중량% 이상 5.0중량% 이하, Al2O3: 0중량% 이상 5.0중량% 이하, SrCO3: 0중량% 이상 3.0중량% 이하, BaCO3: 0중량% 이상 3.0중량% 이하)를 첨가한 가소체 혼합분말을 준비하는 공정과,상기 가소체 혼합분말을 수용매중에서 분쇄하고, 공기투과법으로 측정한 평균입도가 0.5㎛ 이상, 1.5㎛이하의 범위 내에 있는 페라이트 분쇄분말의 슬러리를 형성하는 공정과,상기 슬러리를 농축, 혼련, 자장중 성형 또는 무자장중 성형, 소결하는 공정을 포함하는 소결자석의 제조방법.
- 제9항에 있어서, 분쇄시 또는 혼련시에 분산재를 고형분 비율로 0.1중량% 이상 2.0중량% 이하 첨가하는 소결자석의 제조방법.
- 제9항 또는 제10항에 있어서, 상기 소결을 1230℃ 이상의 온도에서 실행하는 소결자석의 제조방법.
- 제9항 내지 제11항 중 어느 한 항에 기재된 소결자석의 제조방법에 의하여 제조되는 소결자석.
- 제9항 내지 제11항 중 어느 한 항에 기재된 소결자석의 제조방법에 의하여 제조되는 밀도 5.02Mg/m3이상을 보이는 소결자석.
- 제9항 내지 제11항 중 어느 한 항에 기재된 소결자석의 제조방법에 의하여 제조되는 각형비(角形比) 95% 이상을 보이는 소결자석.
- 제4항, 제12항, 제13항 또는 제14항 중 어느 한 항에 기재된 소결자석을 구비하는 회전기.
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Application Number | Priority Date | Filing Date | Title |
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JP2001156085A JP4576751B2 (ja) | 2001-05-24 | 2001-05-24 | 酸化物磁性材料 |
JPJP-P-2001-00156085 | 2001-05-24 | ||
PCT/JP2002/004922 WO2002095772A1 (fr) | 2001-05-24 | 2002-05-21 | Materiau magnetique en oxyde |
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KR20030025229A true KR20030025229A (ko) | 2003-03-28 |
KR100909702B1 KR100909702B1 (ko) | 2009-07-29 |
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KR1020027015461A KR100909702B1 (ko) | 2001-05-24 | 2002-05-21 | 산화물 자성재료 |
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Country | Link |
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US (1) | US6902685B2 (ko) |
EP (1) | EP1389785B1 (ko) |
JP (1) | JP4576751B2 (ko) |
KR (1) | KR100909702B1 (ko) |
CN (1) | CN1264172C (ko) |
WO (1) | WO2002095772A1 (ko) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
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JP5332185B2 (ja) * | 2007-11-16 | 2013-11-06 | ソニー株式会社 | 磁性粉の製造方法、磁性シートの製造方法及びアンテナモジュールの製造方法 |
CN104575910B (zh) * | 2015-02-06 | 2017-05-24 | 江苏新旭磁电科技有限公司 | 电气工程用磁性材料 |
JP7087464B2 (ja) * | 2018-03-07 | 2022-06-21 | Tdk株式会社 | フェライト焼結磁石の製造方法、フェライト粒子の製造方法、及びボンド磁石の製造方法 |
JP7087465B2 (ja) * | 2018-03-07 | 2022-06-21 | Tdk株式会社 | フェライト焼結磁石の製造方法、フェライト粒子の製造方法、及びボンド磁石の製造方法 |
JP7358758B2 (ja) * | 2019-03-27 | 2023-10-11 | Tdk株式会社 | フェライト焼結磁石及びこれを備える回転電気機械 |
WO2023153399A1 (ja) * | 2022-02-10 | 2023-08-17 | 戸田工業株式会社 | 電磁波吸収用フェライト粒子粉末、その製造方法、及びそれを用いた樹脂組成物 |
CN116621572A (zh) * | 2023-04-04 | 2023-08-22 | 宜宾四川大学产业技术研究院 | 经济型复合永磁铁氧体的制备方法 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63186402A (ja) | 1987-01-28 | 1988-08-02 | Sumitomo Special Metals Co Ltd | 高抗磁力を有するフェライト磁石の製造方法 |
DE3726667A1 (de) * | 1987-08-11 | 1989-02-23 | Bayer Ag | Feinteilige magnetische borhaltige hexaferritpigmente, verfahren zu ihrer herstellung sowie deren verwendung |
JPH01283802A (ja) | 1988-05-10 | 1989-11-15 | Minebea Co Ltd | Sr系フェライト磁石 |
JP2908631B2 (ja) * | 1992-03-25 | 1999-06-21 | 住友特殊金属株式会社 | フェライト磁石の製造方法 |
JP2897871B2 (ja) * | 1995-08-11 | 1999-05-31 | ティーディーケイ株式会社 | 磁石粉末、焼結磁石、ボンディッド磁石および磁気記録媒体 |
JP2922864B2 (ja) | 1996-11-18 | 1999-07-26 | 日立金属株式会社 | フェライト磁石およびその製造方法 |
US6139766A (en) * | 1997-02-25 | 2000-10-31 | Tdk Corporation | Oxide magnetic material, ferrite particle, sintered magnet, bonded magnet, magnetic recording medium and motor |
JPH11307331A (ja) | 1998-04-24 | 1999-11-05 | Hitachi Metals Ltd | フェライト磁石 |
JP3488416B2 (ja) * | 1999-07-07 | 2004-01-19 | Tdk株式会社 | フェライト磁石の製造方法 |
JP4194013B2 (ja) * | 1999-10-06 | 2008-12-10 | Tdk株式会社 | フェライト磁石の製造方法 |
-
2001
- 2001-05-24 JP JP2001156085A patent/JP4576751B2/ja not_active Expired - Lifetime
-
2002
- 2002-05-21 CN CNB028012054A patent/CN1264172C/zh not_active Expired - Lifetime
- 2002-05-21 KR KR1020027015461A patent/KR100909702B1/ko active IP Right Grant
- 2002-05-21 WO PCT/JP2002/004922 patent/WO2002095772A1/ja active Application Filing
- 2002-05-21 US US10/381,133 patent/US6902685B2/en not_active Expired - Lifetime
- 2002-05-21 EP EP02771767.7A patent/EP1389785B1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP1389785A4 (en) | 2010-08-25 |
CN1461487A (zh) | 2003-12-10 |
US6902685B2 (en) | 2005-06-07 |
EP1389785B1 (en) | 2016-11-30 |
CN1264172C (zh) | 2006-07-12 |
EP1389785A1 (en) | 2004-02-18 |
JP4576751B2 (ja) | 2010-11-10 |
KR100909702B1 (ko) | 2009-07-29 |
JP2002353020A (ja) | 2002-12-06 |
US20040026654A1 (en) | 2004-02-12 |
WO2002095772A1 (fr) | 2002-11-28 |
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