KR100910048B1 - 산화물자성재료 및 소결자석 - Google Patents
산화물자성재료 및 소결자석 Download PDFInfo
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Abstract
Description
소결온도 (℃) | Br (T) | Hcj (kA/m) | (BH)max (kJ/㎥) | Jr/Js (%) | Hk/Hcj (%) |
1150 | 0.453 | 370.0 | 40.5 | 98.9 | 97 |
1170 | 0.460 | 300.2 | 41.3 | 98.9 | 96 |
1190 | 0.464 | 271.2 | 42.0 | 99.1 | 92 |
소결온도 (℃) | Br (T) | Hcj (kA/m) | BH)max (kJ/㎥) | Hk/Hcj (%) |
1190 | 0.449 | 436.4 | 39.4 | 92 |
1200 | 0.454 | 412.4 | 40.1 | 89 |
Claims (12)
- 식(1-x)CaOㆍ(x/2)R2O3ㆍ(n-y/2)Fe2O3ㆍyMo로 표현되고,R은 La, Nd, Pr로부터 선택되는 적어도 1종의 원소로서 La를 반드시 포함하고, M은 Co, Zn, Ni, Mn으로부터 선택되는 적어도 1종의 원소에서 Co를 반드시 포함하며,몰비를 나타내는 x,y,n이 각각,0.4≤x≤0.6,0.2≤y≤0.35,4≤n≤5.8이고, 또한 1.4≤x/y≤2.5의 관계식을 만족하는 조성을 가지는 육방정의 M형 마그네트 플럼바이트 구조를 가지는 페라이트를 주상으로 하는 산화물자성재료.
- 제1항에 있어서, 4.8≤n≤5.8인 산화물자성재료.
- 제1항 또는 제2항에 기재된 산화물자성재료를 함유하는 소결자석.
- 제3항에 있어서, 보자력(Hcj)이 370kA/m 이상인 기재의 소결자석.
- 제3항에 있어서, 잔류자속밀도(Br)가 0.45T 이상인 기재의 소결자석.
- 제3항에 있어서, 각형비(Hk/Hcj)가 85% 이상인 기재의 소결자석.
- 제6항에 있어서, 각형비(Hk/Hcj)가 90% 이상인 기재의 소결자석.
- 식 (1-x)CaO·(x/2)R2O3·(n-y/2)Fe2O3·yMO로 표현되고,R은, La, Nd, Pr에서 선택되는 적어도 한 종의 원소로써 La를 반드시 포함하고,M은 Co, Zn, Ni, Mn에서 선택되는 적어도 한 종의 원소로써 Co를 반드시 포함하며,몰비를 표시하는 x,y,n은 각각0.4≤x≤0.6,0.2≤y≤0.35,4≤n≤5.8이고,또한 1.4≤x/y≤2.5의 관계식을 만족하는 조성을 구비하는 육방정 M형 마그네트플럼바이트 구조를 가지는 페라이트상을 주상으로 하는 산화물 자성재료를 제조하는 방법으로,상기 원소의 원료분말을 준비하는 공정,원료분말을 배합하는 공정,원료분말을 혼합하는 공정,혼합 원료분말을 가소하는 공정으로 구성되고,가소공정 전 및/또는 후에 H3BO3를 0.2질량% 이하 첨가하는 산화물 자성재료의 제조방법.
- 식 (1-x)CaO·(x/2)R2O3·(n-y/2)Fe2O3·yMO로 표현되고,R은, La, Nd, Pr에서 선택되는 적어도 한 종의 원소로써 La를 반드시 포함하고,M은 Co, Zn, Ni, Mn에서 선택되는 적어도 한 종의 원소로써 Co를 반드시 포함하며,몰비를 표시하는 x,y,n은 각각0.4≤x≤0.6,0.2≤y≤0.35,4≤n≤5.8 이고,또한 1.4≤x/y≤2.5의 관계식을 만족하는 조성을 구비하는 육방정 마그네트 플럼바이트 구조를 가지는 페라이트상을 주상으로 하는 산화물 자성재료를 포함하는 소결자석을 제조하는 방법으로,상기 원소의 원료분말을 준비하는 공정,원료분말을 배합하는 공정,원료분말을 혼합하는 공정,혼합 원료분말을 가소하는 공정,가소체를 분쇄하는 공정,미세하게 분쇄된 분말을 성형하는 공정, 그리고성형체를 소결하는 공정으로 구성되고,가소체를 분쇄하는 공정 전에 SiO2를 1.0질량% 이하, CaCO3를 CaO 환산으로 1.5질량% 이하 첨가하는 소결자석의 제조방법.
- 제8항에 있어서, 상기 혼합원료분말을 가소하는 공정에서, 가소분위기를 산소농도 5% 이상으로 하는 산화물자성재료의 제조방법.
- 제9항에 있어서, 상기 성형체를 소결하는 공정에서, 소결분위기를 산소농도 10% 이상으로 하는 소결자석의 제조방법.
- 삭제
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