KR950701987A - α-알루미나(α-Alumina) - Google Patents

α-알루미나(α-Alumina)

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Publication number
KR950701987A
KR950701987A KR1019940704364A KR19940704364A KR950701987A KR 950701987 A KR950701987 A KR 950701987A KR 1019940704364 A KR1019940704364 A KR 1019940704364A KR 19940704364 A KR19940704364 A KR 19940704364A KR 950701987 A KR950701987 A KR 950701987A
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KR
South Korea
Prior art keywords
alumina
single crystal
particle diameter
hexagonal lattice
weight
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KR1019940704364A
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English (en)
Inventor
마사히데 모리
요시오 우치다
요시나리 사와베
히사시 와타나베
Original Assignee
고사이 아키오
스미토모가가쿠고교 가부시키가이샤
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Publication of KR950701987A publication Critical patent/KR950701987A/ko

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    • 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
    • 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
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/30—Particle morphology extending in three dimensions
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/30—Particle morphology extending in three dimensions
    • C01P2004/40—Particle morphology extending in three dimensions prism-like
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/30—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
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/54—Particles characterised by their aspect ratio, i.e. the ratio of sizes in the longest to the shortest dimension
    • 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
    • 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
    • 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
    • C01P2004/62—Submicrometer sized, i.e. from 0.1-1 micrometer
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/80—Compositional purity

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Abstract

본 발명은 균질하고, 입자 내부에 종결정을 함유하지 않으며; 팔면체 이상의 다면체이고: D/H비(여기서, D는 입자의 빽빽히 찬 육각형 격자의 육각형 격자면에 평행인 최대 입자 직경을 나타내고 H는 육각형 격자면에 수직인 입자 직경을 나타낸다)가 0.5내지 3.0이며; 수 평균 입자 직경이 5㎛를 초과하고 30㎛이하이고; 나트륨 함량이 Na2O로 0.05중량%미만이며; 알루미나 순도가 99.90중량%이상인 α-알루미나 단결정 입자를 포함하는 α-알루미나에 관한 것이다. 분말 형태의 α-알루미나는 고순도, 미세하고 균일한 조성, 좁은 입자 크기 분포 범위 및 응집체가 아닌 팔면체 이상의 다면렉 형태를 갖는 α-알루미나 단결정 입자로 이루어진다. 본 발명의 α-알루미나는 연마제, 소결 제품, 플라즈마용사재, 밀봉재, 세라믹 필터 원료 등으로서 적합하고 매우 높은 순도로 인해, 예를 들면, 이트륨 알루미늄 석류석(YAG), 사파이어, 루비 등과 같은 단결정 및 고순도 소결 제품 원료로서 특히 유용하다.

Description

α-알루미나(α-Alumina)
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 실시예1에서 수득한 α-알루미나의 미립자 모양을 나타내는 주사 전자 현미경(SEM)사진(배율 : 930)이다.
제2도는 실시예 2에서 수득한 α-알루미나의 미립자 모양을 나타내는 주사 전자 현미경 (SEM)사진(배율 : 930)이다.
제5도는 비교 실시예 2에서 수득한 α-알루미나의 미립자 형태를 나타내는 SEM 사진(배율 : 1,900)이다.

Claims (5)

  1. 균질하고, 인자 내부에 종결정(seed crystal)을 함유하지 않으며; 팔면체 이상의 다면체이고; D/H비(여기서, D는 입자의 빽빽히 찬 육각형 격자의 육각형 격자면에 평행인 최대 입자 직경을 나타내고 H는 육각형 격자면에 수직인 입자 직경을 나타낸다)가 0.5내지 3.0이며; 수 평균 입자 직경이 5㎛를 초과하고 30㎛이하 이고; 나트륨 함량이 Na2O로 0.05중랑%미만이며 알루미나 순도가 99.90중량%이상임을 특징으로 하는 α-알루미나 단결정 입자를 포함하는 a-알루미나.
  2. 제1항에 있어서, α-알루미나 단결정 인자가, D90/D10비(여기서, D10및 D/90은 각각 직경이 작은 쪽으로부터 도시한 누적분포의 누적 10%직경 및 누적 90%직경을 나타낸다)가 10이하인 입자 크기 분포를 갖는 것을 특징으로 하는 α-알루미나.
  3. 제1항 또는 제2항에 있어서, 알루미나 순도가 99.95중량%이상임을 특징으로 하는 α-알루미나.
  4. 제1항, 제2항 또는 제3항에 있어서, 단결정을 제조하기 위한 원료인α-알루미나.
  5. 제1항, 제2항 또는 제3항에 있어서, 고순도 소결 제품들 제조하기 위한 원료인 α-알루미나.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019940704364A 1992-06-02 1993-06-01 α-알루미나(α-Alumina) KR950701987A (ko)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP16838592 1992-06-02
JP?92-168385? 1992-06-02
JP31405292 1992-10-28
JP?92-314052? 1992-10-28
PCT/JP1993/000738 WO1993024681A1 (en) 1992-06-02 1993-06-01 α-ALUMINA

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KR950701987A true KR950701987A (ko) 1995-05-17

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

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KR1019940704363A KR100292424B1 (ko) 1992-06-02 1993-06-01 알파-알루미나의제조방법

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US (1) US6165437A (ko)
EP (3) EP0644279B1 (ko)
KR (3) KR100258786B1 (ko)
CN (3) CN1034010C (ko)
AU (3) AU676834B2 (ko)
BR (3) BR9306463A (ko)
CA (3) CA2137249A1 (ko)
CZ (3) CZ284790B6 (ko)
DE (3) DE69326950T2 (ko)
HU (3) HU216721B (ko)
PL (1) PL175036B1 (ko)
RU (3) RU2107662C1 (ko)
SK (3) SK281471B6 (ko)
WO (3) WO1993024682A1 (ko)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100812105B1 (ko) * 2006-08-28 2008-03-12 한국과학기술연구원 파괴저항성이 높은 평판형 고체산화물 연료전지 스택용복합 밀봉재 및 그 제조방법

Families Citing this family (61)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BR9306463A (pt) * 1992-06-02 1998-06-30 Sumitomo Chemical Co Alfa alumina
IL109236A (en) * 1993-04-13 1998-01-04 Sumitomo Chemical Co A-alumina powder and its production
RU2138461C1 (ru) * 1993-07-27 1999-09-27 Сумитомо Кемикал Компани, Лимитед Алюмооксидная композиция (варианты) и способ получения алюмооксидной керамики
US5549746A (en) * 1993-09-24 1996-08-27 General Electric Company Solid state thermal conversion of polycrystalline alumina to sapphire using a seed crystal
EP0679611B1 (en) * 1994-04-28 1999-07-28 Sumitomo Chemical Company Limited Method for producing alpha-alumina powder
FR2722492B1 (fr) * 1994-07-12 1997-03-14 Sumitomo Chemical Co Poudre de nitrure d'aluminium et corps fritte et composition de resine la contenant
AU699077B2 (en) * 1995-02-21 1998-11-19 Sumitomo Chemical Company, Limited Alpha-alumina and method for producing the same
AU699266B2 (en) * 1995-02-28 1998-11-26 Sumitomo Chemical Company, Limited Metal matrix composite and process for producing the same
JPH09157060A (ja) * 1995-12-06 1997-06-17 Sumitomo Chem Co Ltd 無機焼結多孔体およびフィルタ
CN1169555A (zh) * 1996-07-02 1998-01-07 刘莎 不同自然语言语义受限统一编码的计算机输入法
US6203773B1 (en) * 1999-07-12 2001-03-20 Alcoa Inc. Low temperature mineralization of alumina
TW504497B (en) 2000-05-23 2002-10-01 Sumitomo Chemical Co Alpha-alumina powder and heat-conductive sheet containing the same
US6776699B2 (en) * 2000-08-14 2004-08-17 3M Innovative Properties Company Abrasive pad for CMP
JP2002057130A (ja) * 2000-08-14 2002-02-22 Three M Innovative Properties Co Ｃｍｐ用研磨パッド
JP4122746B2 (ja) 2001-05-21 2008-07-23 住友化学株式会社 微粒αアルミナ粉末の製造方法
TWI291936B (ko) * 2001-05-31 2008-01-01 Tdk Corp
US20030140657A1 (en) * 2001-10-30 2003-07-31 Monika Oswald Method of producing glass of optical quality
AU2002358998A1 (en) * 2001-12-27 2003-07-15 Showa Denko K.K. Particulate alumina, method for producing particulate alumina and composition containing particulate alumina
EP1546061A2 (en) * 2002-07-01 2005-06-29 Coorstek Inc. Aluminum oxide ceramic components and methods
JP2004123445A (ja) * 2002-10-02 2004-04-22 Sumitomo Chem Co Ltd αアルミナ粉末およびその製造方法
US20060104895A1 (en) * 2004-11-18 2006-05-18 Saint-Gobain Ceramics & Plastics, Inc. Transitional alumina particulate materials having controlled morphology and processing for forming same
CN100390330C (zh) * 2006-09-21 2008-05-28 中国铝业股份有限公司 低温制备片状α－Al2O3单晶颗粒的方法
US20100056816A1 (en) * 2006-11-01 2010-03-04 Wallin Sten A Shaped porous bodies of alpha-alumina and methods for the preparation thereof
US20080106010A1 (en) * 2006-11-07 2008-05-08 Gratson Gregory M Transparent Ceramic Material and Method of Manufacturing the Same
WO2008134418A1 (en) * 2007-04-24 2008-11-06 Nanocerox, Inc. Sintered polycrystalline yttrium aluminum garnet and use thereof in optical devices
JP5109789B2 (ja) * 2007-05-14 2012-12-26 住友化学株式会社 多孔質フィルムの製造方法
JP2008311221A (ja) * 2007-05-14 2008-12-25 Sumitomo Chemical Co Ltd 積層多孔質フィルム
US10137556B2 (en) * 2009-06-22 2018-11-27 3M Innovative Properties Company Shaped abrasive particles with low roundness factor
JP2010150090A (ja) * 2008-12-25 2010-07-08 Sumitomo Chemical Co Ltd αアルミナ粉末
FR2956111B1 (fr) * 2010-02-11 2012-04-20 Baikowski Alumine alpha, utilisation, procede de synthese et dispositif associes
RU2554196C2 (ru) * 2010-03-09 2015-06-27 Сумитомо Кемикал Компани, Лимитед α-ОКСИД АЛЮМИНИЯ ДЛЯ ПОЛУЧЕНИЯ МОНОКРИСТАЛЛА САПФИРА И СПОСОБ ЕГО ПОЛУЧЕНИЯ
CN102267710B (zh) * 2010-06-03 2014-05-28 中国石油化工股份有限公司 一种含硼拟薄水铝石及由其制备的氧化铝
CN101942698B (zh) * 2010-09-28 2012-07-04 四川鑫通新材料有限责任公司 α-三氧化二铝单晶体的制备方法
JP2014508863A (ja) 2011-03-18 2014-04-10 オーバイト アルミナ インコーポレイテッド アルミニウム含有材料から希土類元素を回収する方法
US9410227B2 (en) 2011-05-04 2016-08-09 Orbite Technologies Inc. Processes for recovering rare earth elements from various ores
EP2714594A4 (en) 2011-06-03 2015-05-20 Orbite Aluminae Inc PROCESS FOR PRODUCING HEMATITE
DE102011111224A1 (de) 2011-08-20 2013-02-21 Evonik Degussa Gmbh Verfahren zur Herstellung von alpha-Aluminiumoxid
US9382600B2 (en) 2011-09-16 2016-07-05 Orbite Technologies Inc. Processes for preparing alumina and various other products
JP6025868B2 (ja) 2012-01-10 2016-11-16 オーバイト アルミナ インコーポレイテッドＯｒｂｉｔｅ Ａｌｕｍｉｎａｅ Ｉｎｃ． 赤泥を処理するプロセス
AU2013203808B2 (en) 2012-03-29 2016-07-28 Aem Technologies Inc. Processes for treating fly ashes
US10191017B2 (en) * 2012-07-06 2019-01-29 Jtekt Corporation Dynamic characteristic calculation apparatus and its method for machine tool
RU2597096C2 (ru) 2012-07-12 2016-09-10 Орбит Алюминэ Инк. Способы получения оксида титана и различных других продуктов
KR101739211B1 (ko) 2012-07-27 2017-05-23 스미또모 가가꾸 가부시끼가이샤 알루미나 슬러리 및 그 제조 방법 그리고 도공액
BR112015006536A2 (pt) 2012-09-26 2017-08-08 Orbite Aluminae Inc processos para preparar alumina e cloreto de magnésio por lixiviação com hcl de vários materiais.
CN104718162B (zh) * 2012-09-28 2017-11-21 Dic株式会社 α‑氧化铝微粒以及其制造方法
BR112015011049A2 (pt) 2012-11-14 2017-07-11 Orbite Aluminae Inc métodos para purificação de íons de alumínio
CN104903241A (zh) * 2012-12-17 2015-09-09 波拉尔蓝宝石有限公司 制造高纯度氧化铝的方法
DE102013112129A1 (de) * 2013-11-05 2015-05-07 Aesculap Ag Dauerfilter für einen Sterilisationsbehälter, Sterilisationsbehälter und Verfahren zum Herstellen eines Dauerfilters
CN103643290B (zh) * 2013-12-02 2016-03-30 昆明理工大学 一种蓝宝石晶体用高纯氧化铝的提纯方法
CN104628023B (zh) * 2015-02-13 2016-05-25 山东长基化工新材料有限公司 超低钠高温α相氧化铝的制备方法
JP6635340B2 (ja) * 2016-08-24 2020-01-22 住友電工ハードメタル株式会社 表面被覆切削工具およびその製造方法
JP6866877B2 (ja) * 2018-05-31 2021-04-28 信越化学工業株式会社 低熱抵抗シリコーン組成物
US11674065B2 (en) 2018-08-10 2023-06-13 Saint-Gobain Ceramics & Plastics, Inc. Composition including a plurality of abrasive particles and method of using same
CN112978772B (zh) * 2019-12-02 2023-01-10 中国石油化工股份有限公司 一种多晶γ-氧化铝八面体颗粒及其制备方法
JPWO2021200490A1 (ko) * 2020-03-31 2021-10-07
CN115867381A (zh) 2020-06-26 2023-03-28 巴斯夫欧洲公司 多孔催化剂载体成型体
WO2021260140A1 (en) 2020-06-26 2021-12-30 Basf Se Production of porous alpha-alumina supports from boehmitic derived aluminas
KR102612361B1 (ko) * 2020-10-07 2023-12-08 주식회사 티세라 α-알루미나 입자를 포함하는 연마재 및 그 제조 방법
CN113233488B (zh) * 2021-05-08 2023-03-21 中铝山东有限公司 一种原晶粒度分布窄的α-氧化铝的制备方法
KR102517803B1 (ko) * 2022-02-03 2023-04-05 주식회사 씨아이에스케미칼 고순도 알루미나, 이의 제조방법 및 이를 포함하는 이차전지 분리막 코팅용 슬러리
KR102555516B1 (ko) * 2022-10-05 2023-07-13 대가파우더시스템 주식회사 다공성 세라믹 필터 제조방법

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3175883A (en) * 1961-06-05 1965-03-30 Aluminium Lab Ltd Process for reducing the soda content of alumina
US3262754A (en) * 1964-12-07 1966-07-26 Aluminium Lab Ltd Method of making low soda alumina of small crystal size
JPS5215498A (en) * 1975-07-28 1977-02-05 Showa Denko Kk Process for production of granular corrundum
CH654819A5 (de) * 1980-09-23 1986-03-14 Alusuisse Verfahren zur herstellung von grobkristallinem alpha-aluminiumoxid und dessen verwendung.
EP0105025B1 (de) * 1982-08-24 1987-04-29 Schweizerische Aluminium Ag Verfahren zur Herstellung von kristalliner Tonerde
JPS60131825A (ja) * 1983-12-21 1985-07-13 Sumitomo Alum Smelt Co Ltd 低ソ−ダアルミナの製造方法
US4847064A (en) * 1987-12-23 1989-07-11 Aluminum Company Of America Economical process for alpha alumina production
US5302368A (en) * 1987-01-29 1994-04-12 Sumitomo Chemical Company, Limited Process for preparation of alumina
EP0277730B1 (en) * 1987-01-29 1992-05-06 Sumitomo Chemical Company, Limited Process for the preparation of alumina
US4822592A (en) * 1987-02-05 1989-04-18 Aluminum Company Of America Producing alpha alumina particles with pressurized acidic steam
EP0281265B1 (en) * 1987-02-26 1992-08-05 Sumitomo Chemical Company, Limited Process for preparing easily mono-dispersible alumina
FR2652075B1 (fr) * 1989-09-21 1991-12-06 Atochem Macrocristaux d'alumine alpha sous forme de plaquettes et procede d'obtention.
BR9306463A (pt) * 1992-06-02 1998-06-30 Sumitomo Chemical Co Alfa alumina
JP3744010B2 (ja) * 1993-06-30 2006-02-08 住友化学株式会社 α−アルミナ粉末の製造方法
RU2138461C1 (ru) * 1993-07-27 1999-09-27 Сумитомо Кемикал Компани, Лимитед Алюмооксидная композиция (варианты) и способ получения алюмооксидной керамики

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100812105B1 (ko) * 2006-08-28 2008-03-12 한국과학기술연구원 파괴저항성이 높은 평판형 고체산화물 연료전지 스택용복합 밀봉재 및 그 제조방법

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