BR8605726A - Processo para preparacao de um po de alumina,po de alfa-alumina,po triturado,processo para producao de um corpo policristalino monolitico e substrato de alumina - Google Patents

Processo para preparacao de um po de alumina,po de alfa-alumina,po triturado,processo para producao de um corpo policristalino monolitico e substrato de alumina

Info

Publication number
BR8605726A
BR8605726A BR8605726A BR8605726A BR8605726A BR 8605726 A BR8605726 A BR 8605726A BR 8605726 A BR8605726 A BR 8605726A BR 8605726 A BR8605726 A BR 8605726A BR 8605726 A BR8605726 A BR 8605726A
Authority
BR
Brazil
Prior art keywords
alumina
polycystaline
monolithic
crushed
alpha
Prior art date
Application number
BR8605726A
Other languages
English (en)
Inventor
Ralph Bauer
Ronald W Trischuk
Arup W Khaund
Joseph Similia
Original Assignee
Norton Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Norton Co filed Critical Norton Co
Publication of BR8605726A publication Critical patent/BR8605726A/pt

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
    • C04B35/111—Fine ceramics
    • 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
    • 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
    • C01P2006/10—Solid density
    • 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
    • C01P2006/14—Pore volume

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
  • Compositions Of Oxide Ceramics (AREA)
BR8605726A 1985-11-21 1986-11-20 Processo para preparacao de um po de alumina,po de alfa-alumina,po triturado,processo para producao de um corpo policristalino monolitico e substrato de alumina BR8605726A (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/800,494 US4657754A (en) 1985-11-21 1985-11-21 Aluminum oxide powders and process

Publications (1)

Publication Number Publication Date
BR8605726A true BR8605726A (pt) 1987-08-18

Family

ID=25178539

Family Applications (1)

Application Number Title Priority Date Filing Date
BR8605726A BR8605726A (pt) 1985-11-21 1986-11-20 Processo para preparacao de um po de alumina,po de alfa-alumina,po triturado,processo para producao de um corpo policristalino monolitico e substrato de alumina

Country Status (9)

Country Link
US (1) US4657754A (pt)
EP (1) EP0224118B1 (pt)
JP (1) JPH07100608B2 (pt)
AU (1) AU591944B2 (pt)
BR (1) BR8605726A (pt)
CA (1) CA1250130A (pt)
DE (1) DE3688775T2 (pt)
ES (1) ES2043597T3 (pt)
ZA (1) ZA868550B (pt)

Families Citing this family (106)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8617387D0 (en) * 1986-07-16 1986-08-20 Alcan Int Ltd Alumina hydrates
US5306480A (en) * 1986-07-16 1994-04-26 Alcan International Limited Alumina hydrates
US5225229A (en) * 1986-07-18 1993-07-06 Aluminum Company Of America Aluminum hydroxide production
US4847064A (en) * 1987-12-23 1989-07-11 Aluminum Company Of America Economical process for alpha alumina production
AU1177288A (en) * 1987-02-19 1988-08-25 Keramont Research Corp. Process for obtaining alpha-alumina powders with submicron median particle size
US4797139A (en) * 1987-08-11 1989-01-10 Norton Company Boehmite produced by a seeded hydyothermal process and ceramic bodies produced therefrom
EP0327687A3 (en) * 1987-12-11 1989-11-15 Norton Company Ultrafiltration membranes
US4797269A (en) * 1988-02-08 1989-01-10 Norton Company Production of beta alumina by seeding and beta alumina produced thereby
US4882014A (en) * 1988-02-24 1989-11-21 Union Oil Company Of California Electrochemical synthesis of ceramic films and powders
JPH0225025A (ja) * 1988-07-14 1990-01-26 Oki Electric Ind Co Ltd ドライエッチング方法
US4964883A (en) * 1988-12-12 1990-10-23 Minnesota Mining And Manufacturing Company Ceramic alumina abrasive grains seeded with iron oxide
US4919829A (en) * 1988-12-30 1990-04-24 The United States Of America As Represented By The Secretary Of Commerce Aluminum hydroxides as solid lubricants
JPH06104816B2 (ja) * 1990-02-09 1994-12-21 日本研磨材工業株式会社 焼結アルミナ砥粒及びその製造方法
US5219806A (en) * 1990-07-16 1993-06-15 Minnesota Mining And Manufacturing Company Alpha phase seeding of transition alumina using chromium oxide-based nucleating agents
US5139978A (en) * 1990-07-16 1992-08-18 Minnesota Mining And Manufacturing Company Impregnation method for transformation of transition alumina to a alpha alumina
US5114802A (en) * 1990-09-05 1992-05-19 Alcan International Limited Caustic-based metal battery with seeded recirculating electrolyte
EP0543347A1 (de) * 1991-11-22 1993-05-26 H.C. Starck GmbH & Co. KG Verfahren zur Herstellung von alpha-Aluminiumoxid-Pulver
AU650382B2 (en) * 1992-02-05 1994-06-16 Norton Company Nano-sized alpha alumina particles
DE4302795C1 (de) * 1993-02-02 1994-08-25 Hoechst Ceram Tec Ag Verfahren zur Herstellung eines dichtgesinterten, plattenförmigen keramischen Formteils aus Aluminiumoxid mit verbesserter Temperaturwechselbeständigkeit, Formteil sowie seine Verwendung
US5277702A (en) * 1993-03-08 1994-01-11 St. Gobain/Norton Industrial Ceramics Corp. Plately alumina
IL109236A (en) * 1993-04-13 1998-01-04 Sumitomo Chemical Co A-alumina powder and its production
US5300130A (en) * 1993-07-26 1994-04-05 Saint Gobain/Norton Industrial Ceramics Corp. Polishing material
HU215748B (hu) * 1993-07-27 1999-02-01 Sumitomo Chemical Co. Alumínium-oxid kompozíció, öntött alumínium-oxid termék, alumínium-oxid kerámia, eljárás a kerámia előállítására és alumínium-oxid részecskék alkalmazása oxidkerámiákhoz
US5322821A (en) * 1993-08-23 1994-06-21 W. R. Grace & Co.-Conn. Porous ceramic beads
US6136288A (en) * 1993-12-16 2000-10-24 Norton Company Firing fines
BR9408462A (pt) * 1993-12-28 1997-08-26 Minnesota Mining & Mfg Tipo nominal especificado de grão abrasivo e artigo abrasivo
AU685205B2 (en) * 1993-12-28 1998-01-15 Minnesota Mining And Manufacturing Company Alpha alumina-based abrasive grain
US5489204A (en) * 1993-12-28 1996-02-06 Minnesota Mining And Manufacturing Company Apparatus for sintering abrasive grain
AU699077B2 (en) * 1995-02-21 1998-11-19 Sumitomo Chemical Company, Limited Alpha-alumina and method for producing the same
US5681658A (en) * 1995-05-30 1997-10-28 Aluminum Company Of America Gelation-resistant alumina
US5593468A (en) * 1995-07-26 1997-01-14 Saint-Gobain/Norton Industrial Ceramics Corporation Sol-gel alumina abrasives
US6287353B1 (en) 1999-09-28 2001-09-11 3M Innovative Properties Company Abrasive grain, abrasive articles, and methods of making and using the same
US6277161B1 (en) 1999-09-28 2001-08-21 3M Innovative Properties Company Abrasive grain, abrasive articles, and methods of making and using the same
US6391072B1 (en) 2000-05-04 2002-05-21 Saint-Gobain Industrial Ceramics, Inc. Abrasive grain
DE10035679A1 (de) * 2000-07-21 2002-01-31 Inst Neue Mat Gemein Gmbh Nanoskalige Korundpulver, daraus gefertigte Sinterkörper und Verfahren zu deren Herstellung
US6372678B1 (en) 2000-09-28 2002-04-16 Fairmount Minerals, Ltd Proppant composition for gas and oil well fracturing
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
US6839362B2 (en) * 2001-05-22 2005-01-04 Saint-Gobain Ceramics & Plastics, Inc. Cobalt-doped saturable absorber Q-switches and laser systems
JP2003034582A (ja) * 2001-07-23 2003-02-07 Taiyo Yuden Co Ltd 再生セラミックスラリー及びその製造方法と、再生セラミック粉末及びその製造方法と、セラミック電子部品及びその製造方法
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
DE10261720A1 (de) * 2002-12-30 2004-07-15 Meyer, Gerhard, Prof. Dr. Fräskeramiken aus Metalloxid-Pulvern mit bimodaler Korngrößenverteilung
TW200422258A (en) * 2003-02-26 2004-11-01 Sumitomo Chemical Co Method for producing α-alumina powder
TWI348457B (en) * 2003-03-04 2011-09-11 Sumitomo Chemical Co Method for producing 帢-alumina particulate
US20040198584A1 (en) * 2003-04-02 2004-10-07 Saint-Gobain Ceramics & Plastic, Inc. Nanoporous ultrafine alpha-alumina powders and freeze drying process of preparing same
TW200427631A (en) * 2003-05-19 2004-12-16 Sumitomo Chemical Co Method for producing α-alumina powder
US7045223B2 (en) * 2003-09-23 2006-05-16 Saint-Gobain Ceramics & Plastics, Inc. Spinel articles and methods for forming same
US20050061230A1 (en) * 2003-09-23 2005-03-24 Saint-Gobain Ceramics & Plastics, Inc. Spinel articles and methods for forming same
US7326477B2 (en) * 2003-09-23 2008-02-05 Saint-Gobain Ceramics & Plastics, Inc. Spinel boules, wafers, and methods for fabricating same
TW200531924A (en) * 2004-03-12 2005-10-01 Sumitomo Chemical Co Method for producing α-alumina particle
TW200540116A (en) * 2004-03-16 2005-12-16 Sumitomo Chemical Co Method for producing an α-alumina powder
TWI367864B (en) * 2004-03-17 2012-07-11 Sumitomo Chemical Co A method for producing an α-alumina particle
US20050276745A1 (en) * 2004-06-15 2005-12-15 Sumitomo Chemical Company, Limited Method for producing an alpha - alumina powder
JP4810828B2 (ja) * 2004-09-03 2011-11-09 住友化学株式会社 微粒αアルミナの製造方法
US7919815B1 (en) 2005-02-24 2011-04-05 Saint-Gobain Ceramics & Plastics, Inc. Spinel wafers and methods of preparation
CN1903724A (zh) * 2005-07-25 2007-01-31 住友化学株式会社 微粒α氧化铝
JP2007055888A (ja) * 2005-07-25 2007-03-08 Sumitomo Chemical Co Ltd 微粒αアルミナ
DE102005045180B4 (de) * 2005-09-21 2007-11-15 Center For Abrasives And Refractories Research & Development C.A.R.R.D. Gmbh Kugelförmige Korundkörner auf Basis von geschmolzenem Aluminiumoxid sowie ein Verfahren zu ihrer Herstellung
US7955519B2 (en) * 2005-09-30 2011-06-07 Cabot Microelectronics Corporation Composition and method for planarizing surfaces
US8562900B2 (en) 2006-09-01 2013-10-22 Imerys Method of manufacturing and using rod-shaped proppants and anti-flowback additives
US20080066910A1 (en) * 2006-09-01 2008-03-20 Jean Andre Alary Rod-shaped proppant and anti-flowback additive, method of manufacture, and method of use
US7998866B2 (en) * 2006-09-05 2011-08-16 Cabot Microelectronics Corporation Silicon carbide polishing method utilizing water-soluble oxidizers
US7678700B2 (en) * 2006-09-05 2010-03-16 Cabot Microelectronics Corporation Silicon carbide polishing method utilizing water-soluble oxidizers
US20080176075A1 (en) 2007-01-15 2008-07-24 Saint-Gobain Ceramics & Plastics, Inc. Ceramic particulate material and processes for forming same
RU2013135445A (ru) 2010-12-31 2015-02-10 Сэнт-Гобэн Керамикс Энд Пластикс, Инк. Абразивное изделие (варианты) и способ его формования
US8883693B2 (en) 2011-03-11 2014-11-11 Carbo Ceramics, Inc. Proppant particles formed from slurry droplets and method of use
US8865631B2 (en) 2011-03-11 2014-10-21 Carbo Ceramics, Inc. Proppant particles formed from slurry droplets and method of use
US10077395B2 (en) * 2011-03-11 2018-09-18 Carbo Ceramics Inc. Proppant particles formed from slurry droplets and methods of use
US9175210B2 (en) 2011-03-11 2015-11-03 Carbo Ceramics Inc. Proppant particles formed from slurry droplets and method of use
US9670400B2 (en) 2011-03-11 2017-06-06 Carbo Ceramics Inc. Proppant particles formed from slurry droplets and methods of use
CN108262695A (zh) 2011-06-30 2018-07-10 圣戈本陶瓷及塑料股份有限公司 包括氮化硅磨粒的磨料制品
EP2726248B1 (en) 2011-06-30 2019-06-19 Saint-Gobain Ceramics & Plastics, Inc. Liquid phase sintered silicon carbide abrasive particles
US9517546B2 (en) 2011-09-26 2016-12-13 Saint-Gobain Ceramics & Plastics, Inc. Abrasive articles including abrasive particulate materials, coated abrasives using the abrasive particulate materials and methods of forming
EP2572585B1 (en) 2011-09-26 2016-08-24 Poly-clip System GmbH & Co. KG Transportation device with star wheels
EP2797715A4 (en) 2011-12-30 2016-04-20 Saint Gobain Ceramics SHAPED ABRASIVE PARTICLE AND METHOD OF FORMING THE SAME
KR20140106737A (ko) 2011-12-30 2014-09-03 생-고뱅 세라믹스 앤드 플라스틱스, 인코포레이티드 형상화 연마입자들 형성
WO2013102170A1 (en) 2011-12-30 2013-07-04 Saint-Gobain Ceramics & Plastics, Inc. Composite shaped abrasive particles and method of forming same
WO2013106602A1 (en) 2012-01-10 2013-07-18 Saint-Gobain Ceramics & Plastics, Inc. Abrasive particles having particular shapes and methods of forming such particles
WO2013106597A1 (en) 2012-01-10 2013-07-18 Saint-Gobain Ceramics & Plastics, Inc. Abrasive particles having complex shapes and methods of forming same
US9242346B2 (en) 2012-03-30 2016-01-26 Saint-Gobain Abrasives, Inc. Abrasive products having fibrillated fibers
WO2013177446A1 (en) 2012-05-23 2013-11-28 Saint-Gobain Ceramics & Plastics, Inc. Shaped abrasive particles and methods of forming same
EP2866977B8 (en) 2012-06-29 2023-01-18 Saint-Gobain Ceramics & Plastics, Inc. Abrasive particles having particular shapes and methods of forming such particles
EP2906392A4 (en) 2012-10-15 2016-07-13 Saint Gobain Abrasives Inc GRINDING PARTICLES WITH SPECIAL FORMS AND METHOD FOR FORMING SUCH PARTICLES
WO2014106173A1 (en) 2012-12-31 2014-07-03 Saint-Gobain Ceramics & Plastics, Inc. Particulate materials and methods of forming same
PL2978566T3 (pl) 2013-03-29 2024-07-15 Saint-Gobain Abrasives, Inc. Cząstki ścierne o określonych kształtach i sposoby formowania takich cząstek
TW201502263A (zh) 2013-06-28 2015-01-16 Saint Gobain Ceramics 包含成形研磨粒子之研磨物品
RU2643004C2 (ru) 2013-09-30 2018-01-29 Сен-Гобен Серэмикс Энд Пластикс, Инк. Формованные абразивные частицы и способы их получения
US9566689B2 (en) 2013-12-31 2017-02-14 Saint-Gobain Abrasives, Inc. Abrasive article including shaped abrasive particles
US9771507B2 (en) 2014-01-31 2017-09-26 Saint-Gobain Ceramics & Plastics, Inc. Shaped abrasive particle including dopant material and method of forming same
WO2015160854A1 (en) 2014-04-14 2015-10-22 Saint-Gobain Ceramics & Plastics, Inc. Abrasive article including shaped abrasive particles
EP3131705A4 (en) 2014-04-14 2017-12-06 Saint-Gobain Ceramics and Plastics, Inc. Abrasive article including shaped abrasive particles
US9902045B2 (en) 2014-05-30 2018-02-27 Saint-Gobain Abrasives, Inc. Method of using an abrasive article including shaped abrasive particles
US9707529B2 (en) 2014-12-23 2017-07-18 Saint-Gobain Ceramics & Plastics, Inc. Composite shaped abrasive particles and method of forming same
US9914864B2 (en) 2014-12-23 2018-03-13 Saint-Gobain Ceramics & Plastics, Inc. Shaped abrasive particles and method of forming same
US9676981B2 (en) 2014-12-24 2017-06-13 Saint-Gobain Ceramics & Plastics, Inc. Shaped abrasive particle fractions and method of forming same
WO2016141575A1 (en) * 2015-03-11 2016-09-15 Shengguo Wang Manufacturing method for nano sized alpha alumina
US10196551B2 (en) 2015-03-31 2019-02-05 Saint-Gobain Abrasives, Inc. Fixed abrasive articles and methods of forming same
TWI634200B (zh) 2015-03-31 2018-09-01 聖高拜磨料有限公司 固定磨料物品及其形成方法
CA2988012C (en) 2015-06-11 2021-06-29 Saint-Gobain Ceramics & Plastics, Inc. Abrasive article including shaped abrasive particles
EP3455320A4 (en) 2016-05-10 2019-11-20 Saint-Gobain Ceramics&Plastics, Inc. GRINDING PARTICLES AND METHOD FOR FORMING THEREOF
EP4071224A3 (en) 2016-05-10 2023-01-04 Saint-Gobain Ceramics and Plastics, Inc. Methods of forming abrasive articles
US11230653B2 (en) 2016-09-29 2022-01-25 Saint-Gobain Abrasives, Inc. Fixed abrasive articles and methods of forming same
US10759024B2 (en) 2017-01-31 2020-09-01 Saint-Gobain Ceramics & Plastics, Inc. Abrasive article including shaped abrasive particles
US10563105B2 (en) 2017-01-31 2020-02-18 Saint-Gobain Ceramics & Plastics, Inc. Abrasive article including shaped abrasive particles
US10865148B2 (en) 2017-06-21 2020-12-15 Saint-Gobain Ceramics & Plastics, Inc. Particulate materials and methods of forming same
EP4081369A4 (en) 2019-12-27 2024-04-10 Saint-Gobain Ceramics & Plastics Inc. GRINDING ARTICLES AND METHODS OF FORMING SAME
JP2024021857A (ja) * 2022-08-04 2024-02-16 住友化学株式会社 セラミックス粉末、樹脂組成物およびセラミックス粉末の製造方法

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1261436C2 (de) * 1961-12-01 1973-07-26 Feldmuehle Ag Sinterkoerper aus Aluminiumoxid
US3637406A (en) * 1970-12-23 1972-01-25 American Lava Corp Ultrapure alumina ceramics formed by coprecipitation
JPS5037806A (pt) * 1973-06-27 1975-04-08
US4154812A (en) * 1977-03-25 1979-05-15 W. R. Grace & Co. Process for preparing alumina
US4179408A (en) * 1977-03-25 1979-12-18 W. R. Grace & Co. Process for preparing spheroidal alumina particles
US4371513A (en) * 1977-03-25 1983-02-01 W. R. Grace & Co. Alumina compositions
JPS55113615A (en) * 1979-02-22 1980-09-02 Sumitomo Alum Smelt Co Ltd Manufacture of alumina powder for sintering
US4314827A (en) * 1979-06-29 1982-02-09 Minnesota Mining And Manufacturing Company Non-fused aluminum oxide-based abrasive mineral
CH654819A5 (de) * 1980-09-23 1986-03-14 Alusuisse Verfahren zur herstellung von grobkristallinem alpha-aluminiumoxid und dessen verwendung.
US4565600A (en) * 1981-04-27 1986-01-21 Criceram Processes for the continuous preparation of single crystals
DE3219607A1 (de) * 1981-05-27 1982-12-23 Kennecott Corp., 06904 Stamford, Conn. Gesintertes schleifmittel und verfahren zu seiner herstellung
DE3371194D1 (en) * 1982-08-24 1987-06-04 Alusuisse Process for the preparation of crystalline aluminium oxide
US4543107A (en) * 1984-08-08 1985-09-24 Norton Company Vitrified bonded grinding wheels containing sintered gel aluminous abrasive grits
NZ210805A (en) * 1984-01-19 1988-04-29 Norton Co Aluminous abrasive grits or shaped bodies
US4555394A (en) * 1984-06-01 1985-11-26 Chiyoda Chemical Engineering & Construction Co., Ltd. Process for the preparation of alumina
JPH0617224B2 (ja) * 1985-03-04 1994-03-09 工業技術院長 易焼結性アルミナ粉体の製造法

Also Published As

Publication number Publication date
AU591944B2 (en) 1989-12-21
EP0224118A1 (en) 1987-06-03
ES2043597T3 (es) 1994-01-01
ZA868550B (en) 1987-07-29
DE3688775T2 (de) 1993-12-23
JPS62128918A (ja) 1987-06-11
AU6535786A (en) 1987-05-28
DE3688775D1 (de) 1993-09-02
JPH07100608B2 (ja) 1995-11-01
US4657754A (en) 1987-04-14
CA1250130A (en) 1989-02-21
EP0224118B1 (en) 1993-07-28

Similar Documents

Publication Publication Date Title
BR8605726A (pt) Processo para preparacao de um po de alumina,po de alfa-alumina,po triturado,processo para producao de um corpo policristalino monolitico e substrato de alumina
PT83744B (pt) Processo para a preparacao de derivados de sulfonamidas biciclicas
PT83179B (pt) Processo para a preparacao de carbinois aril-piperidinicos
PT80573B (pt) Processo para a preparacao de linfotoxina recombinante
ES551592A0 (es) Procedimiento para la fabricacion de dispositivos semi-conductores
PT82710B (pt) Processo para a preparacao de derivados la-7-substituidos de mitomicina
IT8620556A0 (it) Procedimento per la produzione di beta-allumina.
BR8603251A (pt) Clorossulfato de aluminio basico,processos para a preparacao do mesmo e para o tratamento de um meio aquoso
IT8519847A0 (it) Processo per la preparazione di fluorossi-alo-composti.
BR8605269A (pt) Processo para preparacao de(2,2)-paraciclofano
PT83453B (pt) Processo para a preparacao de {1,2,4}triazol{1,5-c}pirimidinas 2-substituidas e-condensadas
MX165173B (es) Procedimiento de empleo de un cebado en dos tiempos para la obtencion de alumina de grano grueso
PT84010B (pt) Processo para a preparacao de derivados de pirimidina
PT83344A (pt) Processo para a preparacao de ypsilon-carbolinas antipsicoticas
BR8605891A (pt) Processo para a preparacao de sulfometilpoliacrilamida
PT83802B (pt) Processo para a fabricacao de um condimento
BR8701887A (pt) Corpo refratario ignitado ligado por carbono,processo para producao de corpo refratario e corpo refratario
BR8605092A (pt) Processo para a preparacao de metacrilamida
IT1186782B (it) Processo per la preparazione di fenilpropanoni
BR8902159A (pt) Processo para producao de graos de alumina monocristalinos
BR8602094A (pt) Processo para a preparacao de benzotiazolsulfenamidas
ES546553A0 (es) Procedimiento para la obtencion de derivados de sulfoniliso (tio)urea
IT1186708B (it) Processo per la preparazione di 2-perfluoropropossi-perfluoropropio nilfluoruro
PT82323B (pt) Processo para a preparacao de alcanoilanilidas
BR8602778A (pt) Processo para a preparacao de um composto

Legal Events

Date Code Title Description
FF Decision: intention to grant
KD Notifcation of receipt (letter patent)
FG Letter patent granted
B21A Patent or certificate of addition expired [chapter 21.1 patent gazette]

Free format text: PATENTE EXTINTA EM 20/11/2001