KR960703487A - 금속, 합금, 혹은 금속탄화물 극미립자 및 그의 형성방법(metal, alloy, or metal carbide nanoparticles and a process for forming same) - Google Patents

금속, 합금, 혹은 금속탄화물 극미립자 및 그의 형성방법(metal, alloy, or metal carbide nanoparticles and a process for forming same)

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KR960703487A
KR960703487A KR1019950706048A KR19950706048A KR960703487A KR 960703487 A KR960703487 A KR 960703487A KR 1019950706048 A KR1019950706048 A KR 1019950706048A KR 19950706048 A KR19950706048 A KR 19950706048A KR 960703487 A KR960703487 A KR 960703487A
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metal
alloy
ultrafine
compound
manganese
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KR1019950706048A
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마제틱 사라
맥헨리 마이클
헨리 스코트 죤
커크페트릭 스코트
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수잔 버켓
카네기 멜론 유니버시티
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Priority claimed from PCT/US1994/007601 external-priority patent/WO1995001643A1/en
Publication of KR960703487A publication Critical patent/KR960703487A/ko

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Abstract

금속 혹은 합금 극미립자가 카본코팅을 가지며 실온에서 히스테리시스를 보이도록 제시되었다. 이 극미립자는 약 0.5~50㎚ 정도의 지름을 가지고, 결정형이거나 비결정형이 될 것이다. 금속, 합금, 금속탄화물 극미립자는 금속 혹은 합금 혹은 금속이나 합금의 산화물로 채워진 흑연로드를 조제하여 형성하는 것이다.
채워진 흑연로드는 금속, 합금 혹은 금속탄화물 극미립자 및 비자성체를 함유한 검댕을 생산하기 위해서 카본아크 방전시킨다. 이 검댕은 계속적으로 비자성체를 금속, 합금 혹은 금속탄화물 극미립자로부터 분리시키기 위해서 자기장 경사를 적용시킨다.

Description

금속, 합금, 혹은 금속탄화물 극미립자 및 그의 형성방법(METAL, ALLOY, OR METAL CARBIDE NANOPARTICLES AND A PROCESS FOR FORMING SAME)
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 본 발명에 따라 형성된 카본코팅된 가돌리늄탄화물 극미분자의 투광형 전자현미경 사진이다. 제2도는 본 발명에 따라 형성된 가돌리늄탄화물 극미결정의 전자회절 패턴이다. 제3도는 본 발명에 따라 분리된 가돌리늄탄화물 극미결정 10㎎의 SQUID 자력계의 M(H,T)의 측정치이다.

Claims (35)

  1. 지름이 약 5~60㎚의 범위인 극미립자로 구성된 카본코팅된 자기 금속 혹은 금속탄화물 극미립자.
  2. 제1항에 있어서, 지름이 약 5~60㎚의 범위인 결정, 지름이 약 5~60㎚의 범위인 비결정, 및 지름이 약 5~60㎚의 범위이고 길이가 1㎝이하인 극미관중에 하나인 극미립자.
  3. 제1항에 있어서, 상자성체와 강자성체의 화합물중 하나로 구성되는 극미립자.
  4. 제3항에 있어서, 철, 코발트, 니켈, 망간비스무트로 이루어진 군에서 선택된 상기한 강자성체 화합물로 이루어진 극미립자.
  5. 제3항에 있어서, 전이금속으로 이루어진 군에서 선택된 상기한 상자성체 화합물로 이루어진 극미립자.
  6. 제5항에 있어서, 란탄, 루테튬 및 프로메튬 이외의 회토류금속으로 이루어진 군에서 선택된 상기한 상자성체 화합물로 이루어진 극미립자.
  7. 자기의 금속산화물로 채워진 흑연로드를 조제하고, 상기한 흑연로드를 자기금속 혹은 금속탄화물 극미립자 및 비자성체를 함유한 검댕을 생산하기 위해서 카본아크 방전시키고, 상기한 비자성체를 상기한 자기 금속 혹은 금속탄화물 극미립자와 분리시키기 위해서 상기한 검댕에 자기장 경사를 적용시키므로서 형성되는 자기금속 혹은 금속 탄화물 극미립자.
  8. 제7항에 있어서, 상자성체와 강자성체의 화합물중 하나로 이루어지는 극미립자.
  9. 제8항에 있어서, 철 코발트, 니켈, 망간비스무트로 이루어진 군에서 선택된 상기한 강자성체 화합물로 이루어진 극미립자.
  10. 제8항에 있어서, 전이금속으로 이루어진 군에서 선택된 상기한 상자성체 화합물로 이루어진 극미립자.
  11. 제10항에 있어서, 란탄, 루테튬 및 프로메튬 이외의 회토류금속으로 이루어진 군에서 선택된 상기한 상자성체 화합물로 이루어진 극미립자.
  12. 제8항에 있어서, 상기한 검댕에 적용된 자기장 경사를 다양화하여 부피당 자기 모멘트에 의해 분리한 극미립자.
  13. a. 자기의 금속산화물로 채워진 흑연로드를 조제하고, b. 상기한 흑연로드를 자기금속 혹은 금속탄화물 극미립자 및 비자성체를 함유한 검댕을 생산하기 위해서 카본아크 방전시키고, c.상기한 비자성체를 상기한 자기 금속 혹은 금속탄화물 극미립자와 분리시키기 위해서 상기한 검댕에 자기장 경사를 적용시키는 단계로 구성되는 금속 자기금속 혹은 금속 탄화물 극미립자를 형성하는 방법.
  14. 제13항에 있어서, 상기한 극미립자 상자성체와 강자성체 화합물중 하나로 이루어지는 극미립자 형성방법.
  15. 제14항에 있어서, 상기한 강자성체 화합물이 철,코발트, 니켈, 망간 비스무트로 이루어진 군에서 선택되어 형성되는 극미립자 형성방법.
  16. 제14항에 있어서, 상기한 상자성체 화합물이 전이금속으로 이루어진 군에서 선택되어 형성되는 극미립자 형성방법.
  17. 제16항에 있어서, 상기한 강자성체 화합물이 란탄, 루테튬 및 프로메튬 이외의 회토류금속으로 이루어진 군에서 선택되어 형성된 극미립자 형성방법.
  18. 제14항에 있어서, 상기한 검댕에 적용된 자기장 경사를 다양화하여 부피당 자기모멘트에 의해 상기한 자기 금속 혹은 금속탄화물 극미립자를 분리하여 형성하는 극미립자 형성방법.
  19. 상기한 금속 혹은 합금 혹은 상기한 금속 혹은 합금의 산화물로 채워진 흑연로드를 조제하고, 상기한 흑연로드를 금속, 합금 혹은 금속탄화물 극미립자 및 비자성체를 함유한 검댕을 생산하기 위해서 카본아크 방전시키고, 상기한 비자성체를 상기한 자기 금속, 합금 혹은 금속탄화물 극미립자로부터 분리시키기 위해서 상기한 검댕에 자기장 경사를 적용시키므로서 형성되는 금속 혹은 합금 극미립자.
  20. 제19항에 있어서, 상자성체와 강자성체 화합물중 하나로 이루어지는 극미립자.
  21. 제20항에 있어서, 실온에서 히스테리시스가 나타나는 상기한 극미립자.
  22. 제21항에 있어서, 상기한 금속합금이 사마륨코발트인 극미립자.
  23. 제22항에 있어서, 상기한 사마륨코발트가 SmCo5, Sm5Co2,Sm2Co|7,및Sm2Co17의 적어도 하나로 형성되는 극미립자.
  24. 제21항에 있어서, 상기한 금속합금이 망간 - 알루미늄 화합물인 극미립자.
  25. 제24항에 있어서, 망간 - 알루미늄 화합물이 망간 - 알루미늄 - 탄화물인 극미립자.
  26. a.상기한 금속 혹은 합금 혹은 상기한 금속 혹은 합금의 산화물로 채워진 흑연로드를 조제하고, b. 상기한 흑연로드를 자기금속합금 극미립자를 함유한 검댕을 생산하기 위해서 카본아크 방전시키고, c. 상기한 비자성체를 상기한 자기 금속합금 극미립자와 분리시키기 위해서 상기한 검댕에 자기장 경사를 적용시키는 단계로 구성되는 금속 혹은 합금 극미립자를 형성하는 방법.
  27. 제26항에 있어서, 상기한 극미립자가 상자성체와 강자성체 화합물중 하나로 이루어진 극미립자 형성방법.
  28. 제27항에 있어서, 실온에서 히스테리시스가 나타나는 상기한 극미립자 형성방법.
  29. 제28항에 있어서, 상기한 금속합금이 사마륨코발트인 극미립자 형성방법.
  30. 제29항에 있어서, 상기한 사마륨코발트가 SmCo5, Sm2Co7,및Sm2Co17의 적어도 하나로 형성되는 극미립자 형성방법.
  31. 제28항에 있어서, 상기한 금속합금이 망간 - 알루미늄 화합물인 극미립자 형성방법.
  32. 제31항에 있어서, 상기한 망간 - 알루미늄 화합물이 망간 - 알루미늄 - 탄화물인 극미립자 형성방법.
  33. 실온에서 히스테리시스가 나타나는 금속합금 극미립자에 있어서, 사마륨코발트 및 망간 - 알루미늄 화합물 중 하나로 구성되는 금속합금 극미립자.
  34. 제33항에 있어서, 상기한 사마륨코발트가 SmCo5, Sm2Co7,및Sm2Co17의 적어도 하나로 형성되는 극미립자.
  35. 제33항에 있어서, 망간 - 알루미늄 화합물이 망간 - 알루미늄 - 탄화물인 극미립자.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
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