KR950701986A - α-알루미나의 제조방법(Process for producing α-alumina) - Google Patents

α-알루미나의 제조방법(Process for producing α-alumina)

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KR950701986A
KR950701986A KR1019940704363A KR19940704363A KR950701986A KR 950701986 A KR950701986 A KR 950701986A KR 1019940704363 A KR1019940704363 A KR 1019940704363A KR 19940704363 A KR19940704363 A KR 19940704363A KR 950701986 A KR950701986 A KR 950701986A
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alumina
producing
volume
converted
transition
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KR1019940704363A
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KR100292424B1 (ko
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마사히데 모리
요시오 우치다
요시나리 사와베
히사시 와타나베
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고사이 아키오
스미토모가가쿠고교 가부시키가이샤
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    • C—CHEMISTRY; METALLURGY
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    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F7/00—Compounds of aluminium
    • C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
    • C01F7/44—Dehydration of aluminium oxide or hydroxide, i.e. all conversions of one form into another involving a loss of water
    • C01F7/441—Dehydration of aluminium oxide or hydroxide, i.e. all conversions of one form into another involving a loss of water by calcination
    • C01F7/442—Dehydration of aluminium oxide or hydroxide, i.e. all conversions of one form into another involving a loss of water by calcination in presence of a calcination additive
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F7/00—Compounds of aluminium
    • C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
    • C—CHEMISTRY; METALLURGY
    • C30—CRYSTAL GROWTH
    • C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
    • C30B25/00—Single-crystal growth by chemical reaction of reactive gases, e.g. chemical vapour-deposition growth
    • C—CHEMISTRY; METALLURGY
    • C30—CRYSTAL GROWTH
    • C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
    • C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
    • C30B29/10—Inorganic compounds or compositions
    • C30B29/16—Oxides
    • C30B29/20—Aluminium oxides
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/01—Particle morphology depicted by an image
    • C01P2004/03—Particle morphology depicted by an image obtained by SEM
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    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
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    • C01P2004/30—Particle morphology extending in three dimensions
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    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
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    • C01P2004/30—Particle morphology extending in three dimensions
    • C01P2004/40—Particle morphology extending in three dimensions prism-like
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    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
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    • C01P2004/30—Particle morphology extending in three dimensions
    • C01P2004/42—(bi)pyramid-like
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/51—Particles with a specific particle size distribution
    • C01P2004/52—Particles with a specific particle size distribution highly monodisperse size distribution
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    • C01—INORGANIC CHEMISTRY
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    • C01P2004/54—Particles characterised by their aspect ratio, i.e. the ratio of sizes in the longest to the shortest dimension
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    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
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    • C01P2004/60—Particles characterised by their size
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/60—Particles characterised by their size
    • C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
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    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/60—Particles characterised by their size
    • C01P2004/62—Submicrometer sized, i.e. from 0.1-1 micrometer
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
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    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/80—Compositional purity

Abstract

전이 알루미나 및/또는 가열시에 전이 알루미나로 전환될 수 있는 알루미나 원료를 염화 수소 1용적%이상을 함유하는 대기 또는 염소 1용적%이상 및 증기 0.1용적%이상을 함유하는 대기중에서 600℃이상, 바람직하게는 600내지 1,400℃, 더욱 바람직하게는 800내지 1,200℃의 온도에서 하소시킴을 특징으로 하여 α-알루미나 단독 결정 입자를 포함하는 α-알루미나 분말을 제조하는 방법. 유용한 알루미나 원료의 예에는 수산화 알루미늄, 명반 및 황산 알루미늄이 포함된다. 이 방법은 순도가 높고 미세하고 균질하며, 입자 크기 분포가 좁고, 응집되지 않으며, 종류, 순도, 형태, 입자 크기 및 조성이 서로 상이한 다양한 알루미나 원료로부터 8면체 이상의 다면체를 행성하는 α-알루미나 단일 결정 입자를 포함하는 α-알루미나 분말을 제공할 수 있다.

Description

α-알루미나의 제조방법(Process for producing α-alumina)
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 실시예 1에서 수득한 α-알루미나의 미립자 형태를 나타내는 주사 전자현미경(SEM) 사진(배율:730)이다.
제3도는 실시예 2에서 수득한 a-알루미나의 입자 크기분포도이다.
제8도는 7-알루미나 단일 결정의 결정 성질을 나타낸다.

Claims (11)

  1. 전이 알루미나 및/또는 가열시에 전이 알루미나로 전환될 수 있는 알루미나 원료를 염화수소 1용적%이상을 함유하는 대기중에서 600℃이상의 온도에서 하소시킴을 특징으로 하여 α-알루미나를 제조하는 방법.
  2. 600℃이상의 온도에서, 염소 1용적%이상 및 증기 0.1용적%이상을 대기에 도입시키면서, 전이 알루미나 및/또는 가열시에 전이 알루미나로 전환될 수 있는 알루미나 원료를 하소시킴을 특징으로 하여 α-알루미나를 제조하는 방법.
  3. 제1항 또는 제2항에 있어서, 하소 온도가 600 내지 1,400℃인, α-알루미나를 제조하는 방법.
  4. 제1항 또는 제2항에 있어서, 하소 온도가 870 내지 1,200℃인, α-알루미나를 제조하는 방법.
  5. 제1항, 제2항 및 제3항중 어느 한 항에 있어서, 가열시에 전이 알루미나로 전환될 수 있는 알루미나 원료가 수산화 알루미늄임을 특징으로 하여 α-알루미나를 제조하는 방법.
  6. 제1항, 제2항 및 제3항 중 어느 한 항에 있어서, 가열시에 전이 알루미나로 전환될 수 있는 알루미나 원료가 명반 또는 황산 알루미늄임을 특징으로 하여 α-알루미나를 제조하는 방법.
  7. 전이 알루미나 및/또는 가열시에 전이 알루미나로 전환될 수 있는 알루미나 원료를 염화 수소 1용적%이상을 함유하는 대기중에서 600 내지 1,400℃의 온도에서 하소시킴을 특징으로 하여, 균질하고, 팔면체 이상의 다면체 형태를 갖고, D/H비(여기서, D는 입자의 빽빽히 찬 육각형 격자의 육각형 격자면에 평행인 최대 입자 직경을 나타내고, H는 육각형 격자면에 수직인 직경을 나타낸다)가 0.5 내지 3.0인 α-알루미나 단일 결정 입자를 포함하는 α-알루미나를 제조하는 방법.
  8. 600 내지 1,400℃의 온도에서 염소 1용적%이상 및 증기 0.1용적%이상을 대기에 도입시키민서 전이 알루미나 및/또는 가열시에 전이 알루미나로 전환될 수 있는 알루미나 원료를 하소시킴을 특징으로 하여, 균질하고, 팔면체 이상의 다면체 형태를 갖고 D/H비(여기서, D는 입자의 빽빽히 찬 육각형 격자의 육각형 격자면에 평행인 최대 입자 직경을 나타내고, H는 육각헝 격자면에 수직인 직경을 나타낸다)가 0.5내지 3.0인 α-알루미나 단일 결정 입자를 포함하는 α-알루미나를 제조하는 법.
  9. 제7항 또는 제8항에 있어서, α-알루미나 단일 결정 입자가 십면체 이상의 다면체 형태를 갖음을 특징으로 하여, α-알루미나 단일 결정 입자를 포함하는 α-알루미나률 제조하는 방법.
  10. 제7항 도는 제8항에 있어서, α-알루미나 단일 결정 입자가 평균 입자 직경이 0.1 내지 30㎛이고 D9O/D1O비(여기서, D1O 및 D9O은 각각 직경이 작은 쪽으로부터 도시한 누적 분포도의 누적 10% 직경 및 누적 90% 직경을 나타낸다)가 10이하인 평균 입자 분포 범위를 갖는, α-알루미나를 제조하는 방법.
  11. 제7항 또는 제8항에 있어서, α-알루미나의 알루미나 순도가 99.90량% 이상임을 특징으로 하는, α-알루미나를 제조하는 방법.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019940704363A 1992-06-02 1993-06-01 알파-알루미나의제조방법 KR100292424B1 (ko)

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
JP16838592 1992-06-02
JP?92-168385? 1992-06-02
JP92-168385 1992-06-02
JP31405292 1992-10-28
JP?92-314052? 1992-10-28
JP92-314052 1992-10-28
PCT/JP1993/000737 WO1993024680A1 (en) 1992-06-02 1993-06-01 PROCESS FOR PRODUCING α-ALUMINA

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KR950701986A true KR950701986A (ko) 1995-05-17
KR100292424B1 KR100292424B1 (ko) 2001-09-17

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KR1019940704364A KR950701987A (ko) 1992-06-02 1993-06-01 α-알루미나(α-Alumina)
KR1019940704363A KR100292424B1 (ko) 1992-06-02 1993-06-01 알파-알루미나의제조방법
KR1019940704452A KR100258786B1 (ko) 1992-06-02 1993-06-01 알파-알루미나

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US (1) US6165437A (ko)
EP (3) EP0644278B1 (ko)
KR (3) KR950701987A (ko)
CN (3) CN1034012C (ko)
AU (3) AU677583B2 (ko)
BR (3) BR9306465A (ko)
CA (3) CA2137247A1 (ko)
CZ (3) CZ283394B6 (ko)
DE (3) DE69326950T2 (ko)
HU (3) HU216730B (ko)
PL (1) PL175036B1 (ko)
RU (3) RU2114059C1 (ko)
SK (3) SK281471B6 (ko)
WO (3) WO1993024682A1 (ko)

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