KR950015415A - 회토류 자성분말, 그 영구 자석 및 그 제조 방법 - Google Patents

회토류 자성분말, 그 영구 자석 및 그 제조 방법 Download PDF

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KR950015415A
KR950015415A KR1019940029851A KR19940029851A KR950015415A KR 950015415 A KR950015415 A KR 950015415A KR 1019940029851 A KR1019940029851 A KR 1019940029851A KR 19940029851 A KR19940029851 A KR 19940029851A KR 950015415 A KR950015415 A KR 950015415A
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아쯔노리 기따자와
도시유끼 이시바시
고지 아끼오까
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야스까와 히데아끼.
세이꼬 엡슨 가부시끼 가이샤
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Abstract

자기적 상호 작용을 이용하여 자기 특성을 높인 자성분말 및 영구 자석을 제공한다.
자성분말 A(잔류 자속 밀도 BrA, 보자력 HcA) 및 자성분말 B(잔류 자속 밀도 BrB, 보자력 HcB)를 포함한 2종류 이상의 혼합 분말로되며, 각 잔류 자속 밀도 및 보자력 이 BrA〉BrB, HcA〈HcB의 관계를 갖는 자성분말, 이 자성분말로 제조되는 본드 자석 또는 소결 자석 및 자성분말의 혼합방법 및 자석의 제조방법이 널리 제공된다.

Description

회토류 자성분말, 그 영구 자석 및 그 제조 방법
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 Al분말의 혼합량과 자기 특성의 관계도,
제2도는 혼합 본드 자석의 감자(減磁) 곡선(실시예 A 및 비교예 1-1)을 도시한 그래프,
제3도는 혼합 본드 자석의 감자 곡선(비교예 1-2 및 비교예 1-3)을 도시한 그래프.

Claims (40)

  1. 자성 분말 A(잔류 자속 밀도 BrA, 보자력 HcA) 및 자성 분말 B(잔류 자속 밀도 BrB보자력 HcB)를 포함하는 2종류 이상의 혼합 분말로 이루어지며, 상기 각 잔류 자속 밀도 및 보자력이 BrA〉BrB), HcA〈HcB의 관계를 갖는 것을 특징으로 하는 자성 분말.
  2. 제1항에 있어서, 각 보자력에 HcA=y.HcB(0.1〈y)의 관계를 갖는 것을 특징으로 하는 자성분말.
  3. 제2항에 있어서, 각 잔류 자속 밀도가 BrA=X, BrB(1X2, 0.5y1)의 관계를 갖는 것을 특징으로 하는 자성 분말.
  4. 제1항에 있어서, 상기 자성분말 A(단, 분말 A와분말B의 중량비율이 i:j임)에 있어서 이 혼합 분말의 총량의 1%를 임의로 꺼내 그 혼합 분말안의 분말 A와 분말 B의 중량비율이 i': j';일 때 상기 각 중량 비율이 i/j=a(i'/i')(0.5a1.5)의 관계를 갖는 것을 특징으로 하는 자성 분말.
  5. 제4항에 있어서, 상기 a가 0.9a1.1인 것을 특징으로 하는 자성분말.
  6. 제1항에 있어서, 상기 혼합 자성 분말에 있어서 자성 분말 A(평균 분말입자 지름:rA)와 자성 분말 B(평균 입자 지금;rB)의 접촉점의 수 n이 rA〈rB의 경우에는,｛2(rA+rB)2/rA2｝＜ n, 또, rA 〉rB의 경우에는｛2(rA＞+rB)2/rB2｝＜ n인 것을 특징으로 하는 자성분말.
  7. 제1항 내지 제6항 중 어느 한항 기재의 자성분말로부터 제조되는 것을 특징으로 하는 본드 자석.
  8. 제7항에 있어서, 자성분말 체적 충진율이 50%이상인 것을 특징으로 하는 본드 자석.
  9. 제1항 내지 6항 중 어느 한항 기재의 자성분말로부터 제조 되는 것을 특징으로 하는 소결 자석.
  10. 제9항에 있어서, 자성분말 체적 충진율이 95%이상인 것을 특징으로 하는 소결자석.
  11. 제1항에 있어서, 자성분말 A가 희토금속(Y를 포함하는 희토류 원소의 가운데 1종류 또는 2종류 이상으로서 이하 R이라고 약칭함), 환이 금속(주로 Fe 및 Go로 되며, 이하 TM이라고 약칭함) 및 질소, 탄소 또는 수소로 되는, 즉 R2TM17,(NCH)x 계로 되며, 자성 분말 B가 R 및 Co로 되어 필요에 응해서 Fe, Cu, Zr을 포함하는 즉 R2TM17계로 되는 것을 특징으로 하는 자성 분말.
  12. 제11항 기재의 자성 분말로 제조되는 것을 특징으로 하는 본드 자석.
  13. 제12항에 있어서, 자본 체적 충진율의 최대치 및 최대 에너지직((BH)max)의 최대치에 각각 대응하는 혼합 분말중 1개의 분말의 중량%를 비교할 때, 각각의 혼합량(중량%)에 5중량% 이상의 차가 존재하는 것을 특징으로 하는 본드 자석.
  14. 제11항에 있어서, 각 분말의 평균 입자 지름이 rA〈rB의 관계를 갖는 것을 특징으로 하는 자성분말.
  15. 제11항에 있어서, 각 분말의 평균 입자 지름이 0.1㎛rA10㎛, 10㎛rB100㎛ 및 rA〈rB의 관계를 갖는 것을 특징으로 하는 자성 분말.
  16. 제1항에 있어서, 자성분말 A가 R2TM17(NCH)x로 되며, 자성분말 B가 R, TM및 B로 되는 즉, R2TM14B계 인것을 특징으로 하는 자성분말.
  17. 제1항에 있어서, 자성분말 A가 R2TM17계로 되며, 자성분말 A와는 조성을 달리하는 R2TM14계로 되는 것을 특징으로 하는 자성분말.
  18. 제1항에 있어서, 자성분말 A가 R2TM14B계로 되며, 자성분말 B가 R2TM17계로 되는 것을 특징으로 하는 자성분말.
  19. 제1항에 있어서, 자성분말 A가 TM(주로 Fe)으로 되며, 자성분말 B가 R2TM17계로 되는 것을 특징으로 하는 자성분말.
  20. 제1항에 있어서, 자성분말 A가 TM(주로 Fe)으로 되며, 자성분말 B가 R2TM17Nx계로 되는 것을 특징으로 하는 자성분말.
  21. 제1항에 있어서 자성분말A가 TM(주로 Fe)으로되며, 자성분말 B가 R2TM17B계로 되는 것을 특징으로 하는 자성분말.
  22. 제1항에 있어서, 자성분말 A가 TM(주로 Fe)으로 되며, 자성분말 B가 RTM5계로 되는 것을 특징으로 하는 자성분말.
  23. 제1항에 있어서, 자성분말 A가 TM 및 질소로 되며, 자성분말 B가 R2TM17계로 되는 것을 특징으로 하는 자성분말.
  24. 제1항에 있어서, 자성분말 A가 TM및 질소로 되며, 자성분말 B가 R2TM17Nx계로 되는 것을 특징으로 하는 자성분말.
  25. 제1항에 있어서, 자성분말 A가 TM 및 질소로 되며, 자성분말 B가 R2TM14B계로 되는 것을 특징으로 하는 자성분말.
  26. 제1항에 있어서, 자성분말 A가 TM및 질소로 되며, 자성분말 B가 RTM5계로 되는 것을 특징으로 하는 자성분말.
  27. 제1항에 있어서, 자성분말 A가 즉, 페라이트로 되며, 자성분말 B가 R2TM17계로 되는 것을 특징으로 하는 자성분말.
  28. 제1항에 있어서, 자성분말 A가 페라이트로 되며, 자성분말 B가 R2TM17Nx계로 되는 것을 특징으로 하는 자성분말.
  29. 제1항에 있어서, 자성분말 A가 페라이트로 되며, 자성분말 B가 R2TM14B계로 되는 것을 특징으로 하는 자성분말.
  30. 제1항에 있어서, 자성분말 A가 페라이트로 되며, 자성분말 B가 RTM5계로 되는 것을 특징으로 하는 자성분말.
  31. 제1항에 있어서, 자성분말 A가 RTM5계로 되며, 자성분말 B가 R2TM17계로 되는 것을 특징으로 하는 자성분말.
  32. 제1항에 있어서, 자성분말 A가 RTM5계로 되며, 자성분말 B가 R2Fe14B계로 되는 것을 특징으로 하는 자성분말.
  33. 제1항에 있어서, 자성분말 A가 RTM5계로 되며, 자성분말 B가 R2TM17Nx계로 되는 것을 특징으로 하는 자성분말.
  34. 제11항 내지 제33항(단, 제12항, 제13항을 제외) 기재의 자성분말을 이용한 것을 특징으로 하는 본드자석.
  35. 제14항 내지 제33항중 어느 한항 기재의 자성분말로 제조되는 것을 특징으로 하는 소결 자석.
  36. 자성분말 A와 자성 분말 B를 각각 별도로 분쇄하여, 그후 자성분말 A와 자성분말 B를 혼합하는 것을 특징으로 하는 혼합분말의 제조방법.
  37. 자성분말 A, 혹은 자성분말 B의 어느 것을 분쇄하며, 그후 남은 자성분말을 분쇄하는 경우 혼합을 동시에 행하는 것을 특징으로 하는 혼합 분말의 제조방법.
  38. 자성분말 A와 자성분말 B의 분쇄와 혼합을 동시에 행하는 것을 특징으로 하는 혼합 분말의 제조방법.
  39. 제36항 내지 제38항 중 어느 한항 기재의 혼합분말의 제조방법에 의해 얻어진 혼합 분말에 바인더 (binder)를 혼합, 혼련하며, 그 분말을 착자(着磁)후 성형 하는 것을 특징으로 하는 본드 자석의 제조방법.
  40. 제36항 내지 제38항 중 어느 한항 기재의 혼합 분말의 제조방법에 의해 얻어진 혼합 분말을 프라즈마 소결하는 것을 특징으로 하는 소결 자석의 제조방법.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019940029851A 1993-11-11 1994-11-11 희토류 자성분말, 그 영구자석 및 그 제조 방법 KR100237097B1 (ko)

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