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JPS6433013A - Production of easy-to-sinter aluminum powder - Google Patents

Production of easy-to-sinter aluminum powder

Info

Publication number
JPS6433013A
JPS6433013A JP62188324A JP18832487A JPS6433013A JP S6433013 A JPS6433013 A JP S6433013A JP 62188324 A JP62188324 A JP 62188324A JP 18832487 A JP18832487 A JP 18832487A JP S6433013 A JPS6433013 A JP S6433013A
Authority
JP
Japan
Prior art keywords
hydrosol
powder
alumina
particle diameter
dispersed
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
JP62188324A
Other languages
Japanese (ja)
Other versions
JPH0712927B2 (en
Inventor
Hiroshi Umezaki
Takuo Harato
Toshiki Furubayashi
Toshio Ashitani
Toru Ogawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Chemical Co Ltd
Original Assignee
Sumitomo Chemical Co 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 Sumitomo Chemical Co Ltd filed Critical Sumitomo Chemical Co Ltd
Priority to JP62188324A priority Critical patent/JPH0712927B2/en
Publication of JPS6433013A publication Critical patent/JPS6433013A/en
Publication of JPH0712927B2 publication Critical patent/JPH0712927B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Compositions Of Oxide Ceramics (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Abstract

PURPOSE:To obtain the title aluminum powder having excellent fluidity and capable of providing a compact having excellent sintering property, sintering density, and mechanical strength by granulating and drying a hydrosol wherein specified hydrated alumina is dispersed, and then calcining the granules. CONSTITUTION:The hydrated alumina having a boehmite structure, wherein 0.1-20wt.% alpha-alumina having 10-70% alpha-coherency and <=0.5mu mean primary particle diameter is uniformly dispersed as a seed is dispersed in water or an aq. acidic soln. so that the content of alumina, expressed in terms of AAl2O3, is controlled to 5-50wt.% to obtain a hydrosol. A binder such as PVA and CMC is then added, as required, to the hydrosol, the hydrosol is granulated and dried by a spray drying method, etc., to obtain granular dry powder having 1-200mu granule diameter (secondary particle diameter). The powder is then calcined at >=1000 deg.C for several minutes to ten-odd hours, and then disintegrated by a ball mill, etc., to obtain the title uniform powder having <=1mu mean primary particle diameter.
JP62188324A 1987-07-28 1987-07-28 Method for producing easily sinterable alumina powder Expired - Fee Related JPH0712927B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62188324A JPH0712927B2 (en) 1987-07-28 1987-07-28 Method for producing easily sinterable alumina powder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62188324A JPH0712927B2 (en) 1987-07-28 1987-07-28 Method for producing easily sinterable alumina powder

Publications (2)

Publication Number Publication Date
JPS6433013A true JPS6433013A (en) 1989-02-02
JPH0712927B2 JPH0712927B2 (en) 1995-02-15

Family

ID=16221610

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62188324A Expired - Fee Related JPH0712927B2 (en) 1987-07-28 1987-07-28 Method for producing easily sinterable alumina powder

Country Status (1)

Country Link
JP (1) JPH0712927B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995014638A1 (en) * 1993-11-25 1995-06-01 Sumitomo Chemical Company, Limited PROCESS FOR PRODUCING α-ALUMINA POWDER
JP2005206460A (en) * 2003-12-25 2005-08-04 Showa Denko Kk Easily sinterable alumina particle
JP2009519203A (en) * 2005-12-12 2009-05-14 ダブリュー・アール・グレース・アンド・カンパニー−コーン Alumina particles and method for producing the same
JP2014069996A (en) * 2012-09-28 2014-04-21 Yamaguchi Seiken Kogyo Kk PRODUCTION METHOD OF FINE PARTICLE α-ALUMINA

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995014638A1 (en) * 1993-11-25 1995-06-01 Sumitomo Chemical Company, Limited PROCESS FOR PRODUCING α-ALUMINA POWDER
JP2005206460A (en) * 2003-12-25 2005-08-04 Showa Denko Kk Easily sinterable alumina particle
JP2009519203A (en) * 2005-12-12 2009-05-14 ダブリュー・アール・グレース・アンド・カンパニー−コーン Alumina particles and method for producing the same
JP2014069996A (en) * 2012-09-28 2014-04-21 Yamaguchi Seiken Kogyo Kk PRODUCTION METHOD OF FINE PARTICLE α-ALUMINA

Also Published As

Publication number Publication date
JPH0712927B2 (en) 1995-02-15

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees