WO2008149690A1 - Α-alumina with satisfactory suitability for sintering and process for producing the same - Google Patents

Α-alumina with satisfactory suitability for sintering and process for producing the same Download PDF

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Publication number
WO2008149690A1
WO2008149690A1 PCT/JP2008/059522 JP2008059522W WO2008149690A1 WO 2008149690 A1 WO2008149690 A1 WO 2008149690A1 JP 2008059522 W JP2008059522 W JP 2008059522W WO 2008149690 A1 WO2008149690 A1 WO 2008149690A1
Authority
WO
WIPO (PCT)
Prior art keywords
sintering
alumina
bulk density
sinter
hours
Prior art date
Application number
PCT/JP2008/059522
Other languages
French (fr)
Japanese (ja)
Inventor
Masahiko Abe
Toshihiro Matsuba
Original Assignee
Nippon Light Metal Company, Ltd.
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 Nippon Light Metal Company, Ltd. filed Critical Nippon Light Metal Company, Ltd.
Publication of WO2008149690A1 publication Critical patent/WO2008149690A1/en

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Classifications

    • 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
    • C01P2004/51—Particles with a specific particle 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
    • C01P2004/60—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
    • C01P2006/11—Powder tap 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
    • C01P2006/12—Surface area
    • 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

Abstract

Satisfactorily sinterable α-alumina which readily sinters at a low temperature and which, upon sintering at 1,500°C for 3 hours, gives a sinter having a bulk density of 3.90 g/cm3 or higher. It changes little in density upon sintering and has excellent sintering properties. Also provided is a process for producing the α-alumina. The α-alumina with satisfactory suitability for sintering is one produced by sintering aluminum hydroxide obtained by the Bayer process. When sintered under the conditions of 1,500°C and 3 hours, the α-alumina gives a sinter having a bulk density (A) [(mass of sintered sample)/(volume of sintered sample)] of 3.90 g/cm3 or higher. The density change between the sinter bulk density (A) and a sinter bulk density (B) as measured after sintering at 1,600°C for 3 hours, {[(B-A)/A]×100}, is 1% or less. The α-alumina is produced by introducing aluminum hydroxide having a soda content of 0.1 mass% or lower into a stationary burning furnace under such conditions as to result in a compact bulk density of 1.0 g/cm3 or lower, burning the compact, and pulverizing the burning product.
PCT/JP2008/059522 2007-06-07 2008-05-23 Α-alumina with satisfactory suitability for sintering and process for producing the same WO2008149690A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007151268A JP5217258B2 (en) 2007-06-07 2007-06-07 Sinterable α-alumina and method for producing the same
JP2007-151268 2007-06-07

Publications (1)

Publication Number Publication Date
WO2008149690A1 true WO2008149690A1 (en) 2008-12-11

Family

ID=40093514

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/059522 WO2008149690A1 (en) 2007-06-07 2008-05-23 Α-alumina with satisfactory suitability for sintering and process for producing the same

Country Status (2)

Country Link
JP (1) JP5217258B2 (en)
WO (1) WO2008149690A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5978926A (en) * 1982-10-29 1984-05-08 Mitsubishi Chem Ind Ltd Manufacture of easily sinterable alumina
JPH0393617A (en) * 1989-09-04 1991-04-18 Showa Denko Kk Production of easily sinterable alumina
JPH06144831A (en) * 1992-10-30 1994-05-24 Showa Denko Kk Production of easily sinterable alumina fine particle
JPH08290914A (en) * 1995-02-21 1996-11-05 Sumitomo Chem Co Ltd Alpha-alumina and its production

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4890758B2 (en) * 2003-12-25 2012-03-07 昭和電工株式会社 Easy-sintering alumina particles

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5978926A (en) * 1982-10-29 1984-05-08 Mitsubishi Chem Ind Ltd Manufacture of easily sinterable alumina
JPH0393617A (en) * 1989-09-04 1991-04-18 Showa Denko Kk Production of easily sinterable alumina
JPH06144831A (en) * 1992-10-30 1994-05-24 Showa Denko Kk Production of easily sinterable alumina fine particle
JPH08290914A (en) * 1995-02-21 1996-11-05 Sumitomo Chem Co Ltd Alpha-alumina and its production

Also Published As

Publication number Publication date
JP2008303105A (en) 2008-12-18
JP5217258B2 (en) 2013-06-19

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