KR950701892A - 방습성 질화알루미늄 분말의 제조방법 빛 이러한 방법으로 제조한 분말(Method of making moisture resistant aluminum nitride powder and powder produced thereby) - Google Patents

방습성 질화알루미늄 분말의 제조방법 빛 이러한 방법으로 제조한 분말(Method of making moisture resistant aluminum nitride powder and powder produced thereby)

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KR950701892A
KR950701892A KR1019940704475A KR19940704475A KR950701892A KR 950701892 A KR950701892 A KR 950701892A KR 1019940704475 A KR1019940704475 A KR 1019940704475A KR 19940704475 A KR19940704475 A KR 19940704475A KR 950701892 A KR950701892 A KR 950701892A
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aluminum nitride
powder
containing powder
silicate
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이. 하워드 케빈
에프. 캐롤 다니엘
제이. 비스쿠프스키 스코트
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스티븐 에스. 그레이스
더 다우 케미칼 캄파니(The Dow Chemical Company)
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Abstract

본 발명은 (a)표면의 일부이상에 질화알루미늄을 갖는 질화알루미늄 함유 분말 위에 알킬 및 알콕시알킬라디말로 이루어지는 그룹 중에서 선택되는 치환체를 갖는 실리케이트의 층을 피복시키고, (b) 피복된 질화알루미늄 함유 분말을 실리케이트가 표면 질화알루미늄과 반응하여 표면 질화알루미늄에 Si-Al-O-N의 층이 결합되어 있는 처리된 질화알루미늄 함유 분말을 형성시키기에 충분한 시간 동안 약350내지 1000℃의 온도에서 처리함을 포함하는, 방습성 질화알루미늄 함유 분말 제조 방법에 관한 것이다. 실리케이트에는 알킬 라디칼 또는 알콜시알킬 라디칼이 결합되어 있다. 본 발명의 방법으로 표면 질화알루미늄에 반응 결합된 Si-Al-O-N층을 갖는 방습성 질화알미늄 함유 부말을 수득한다.

Description

방습성 질화알루미늄 분말의 제조방법 및 이러한 방법으로 제조한 분말(Method of making moisture resistant alminum nitride powder and powder produced thereby)
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음

Claims (16)

  1. (a) 표면의 일부 이상에 질화알루미늄을 갖는 질화알루미늄 함유 분말 위에 알킬 및 알콕시알킬 라디칼로 이루어지는 그룹으로부터 선택된 치환체을 갖는 실리케이트의 층을 피복 시키고, (b)피복된 질화알루미늄 함유 분말을 실리케이트가 표면 질화알루미늄과 반응하여 표면 질화알루미늄에 Si-Al-O-N의 층이 결합되어 있는 처리된 질화알루미늄 함유 분말을 형성 시키기에 충분한 시간동안 350 내지 1000℃의 온도에서 열처리함을포함하여, 방습성 질화알미늄 함유 분말을 제조하는 방법.
  2. 제1항에 있어서, 실리케이트가 다음 일반식을 갖는 방법 : RO({RO}2SIO)nSi(OR)3상기식에서,R은 각각 독립적으로 알킬 및 알콕시알킬 라디칼은 탄소수가 1내지 12이다}로 이루어지는 그룹으로부터 선택되며, n은 O내지 2의 수이다.
  3. 제1항에 있어서, 열 처리 단계가 500내지 700℃의 온도에서 수행되는 방법.
  4. 제1항에 있어서, 열 처리 단계가 1시간 내지 2시간 동안 수행되는 방법.
  5. 제1항 내지 제4항중의 어느 한 항에 있어서, 질화알루미늄 함유 분말 위에 실리케이드와 용매의 용액을 도포하여 피복 단계를 수행하고, 피복된 질화알루미늄 함유 분말을 열 처리 하기 전에 피막으로부터 용매를 제거하고 분말을 75 내지 200℃의 범위의 온도에 노출시킴을 추가로 포함하는 방법.
  6. 제5항에 있어서, 피복된 질화알루미늄 함유 분말을 열처리하기 전에 분말을 100 내지 150℃범위의 온도에 노출시키는 방법.
  7. 제1항에 있어서, c) 처리된 질화알루미늄 함유 분말 위에 알킬 및 알콕시알킬 라디칼로 이루어지는 그룹으로 부터 선택된 치환체를 갖는 제2 실리케이트의 층을 피복시키고, d) 피복되고 처리된 질화알루미늄 함유 분말을 제2실리케이트가 처리된 질화알루미늄 함유 위에 Si및 O를 함유하는 무정형 층을 형성시키기에 충분한 시간 동안 350 내지 1000℃의 온도에서 열 철리함을 추가로 포함하는 방법.
  8. 제1항에 있어서, 질화알미늄 함유 분말이 피복 단계에 앞서 고온에서 산소 함유 대기와 접촉됨으로서 산화되는 방법.
  9. 제1항 또는 제8항에 있어서, 피복 단계가(a) 질화알미늄 함유 분말을 탄소수가 1 내지 4인 알킬 알콜중에 분산시켜 분산액을 형성하시키고, (b) 분산액에 (ⅰ)실리케이트에 이어 (ⅱ) 물을 용해시켜 도입함으로써 수행되는 방법.
  10. 제9항에 있어서, 물에 이어 가수분해 촉매가 분산액에 용해되는 방법.
  11. 제10항에 있어서, 피복 용액속에, 질화알루미늄 함유 분말의 용적을 기준으로 알킬 알콜이 50 내지 300용적%의 양으로 사용되고, 질화알류미늄 함유 분말의 중량을 기준으로 실리케이트가 1내지 150중량%의 양으로 사용되며, 실리케이트의 중량을 기중으로 물이 100내지 400중량%의 양으로 사용되고, 물의 중량을 기준으로 가수분해 촉매가 10 내지 75중량%의 양으로 사용하는 방법.
  12. 제1항, 제7항 또는 제8항에 있어서, 질화알루미늄 함유 분말의 중량을 기준으로 실리케이트가 약5내지 약 50중량%의 양으로 사용되며, 실리케이트의 중량을 기준으로 물이 약100내지 약200중량%의 양으로 사용되는 방법.
  13. (a)(ⅰ)질화알루미늄 분말을 탄소수 1내지 4의 제1알킬 알콜에 분산시켜 분산액을 형성시키고, (ⅱ)(A) 알킬 및 알콕시알킬 라디칼로 이루어지는 그룹으로부터 선택된 치환체를 갖는 실리케이트와 탄소수 1내지 4의 제2 알킬 알콜의 용액(여기서, 실리케이트는 질화 알루미늄 분말의 중량을 기준으로 1내지 150중량%의 양으로 사용되고, 제1및 제2 알킬 알콜은 질화 알루미늄 분말의 용적을 기준으로50내지 300용적%의 양으로 사용된다), (B) 물(이는 실리케이트의 중량을 기중으로 100 내지 400중량%의 양으로 사용된다)및 (C)아세트산, 포름산 및 프로피온산으로부터 선택되는 유기산 또는 수산화나트륨, 수산화칼륨 및 수산화 암모늄으로부터 선택되는 염기인 가수분해 촉매(이는 물의 중량을 기준으로 10 내지 75중량%의 양으로 사용된다) 순으로 분산액에 용해(질화알루미늄 분말, 알킬 알콜, 시리케이트, 물 및 가수분해 촉매는 분산 용액을 형성한다)시키고, (b) 질화알루미늄 분말을 5분 이상 분산 용액 속의 나머지 성분과 접촉시키고, (c) 분산 용액을 75 내지 200℃에서 건조시켜 피복된 질화알루미늄 분말을 형성시키고, (d) 피복된 질화알미늄 분말을 실리이트가 질화알루미늄 분말과 반응하여 질화알루미늄 분말을 결합된 Si-Al-O-N의층을 형성시키기에 충분한 시간 동안 350 내지 1000℃의온도에서 열처리함을 포함하여 방습성 질화알루미늄 분말을 제조하는 방법.
  14. 표면의 일부이상에 Si-Al-O-N의층이 반응 결합되어 있는 질화알루미늄 함유 분말을 포함하는 방습성 질화알루미늄 함유 분말.
  15. 질화알루미늄 함유 분말이 실질적으로 질화알루미늄으로 구성되고, Si-Al-O-N층의 두께가 20내지 100 A인 제13항의 방습성 질화알루미늄 함유 분말.
  16. 제14항에 있어서, Si-Al-O-N층 주변에 방습성 질화알루미늄 함유 분말의 외부 표면에 Si및 O를 함유하는 무정형 층을 추가로 포함하는 방습성 질화알루미늄 함유 분말.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019940704475A 1992-06-08 1993-01-28 방습성질화알루미늄분말의제조방법및이러한방법으로제조한분말 KR100249750B1 (ko)

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US5508110A (en) 1996-04-16
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