JPS55140719A - Manufacture of starting material alumina for porcelain - Google Patents

Manufacture of starting material alumina for porcelain

Info

Publication number
JPS55140719A
JPS55140719A JP4898679A JP4898679A JPS55140719A JP S55140719 A JPS55140719 A JP S55140719A JP 4898679 A JP4898679 A JP 4898679A JP 4898679 A JP4898679 A JP 4898679A JP S55140719 A JPS55140719 A JP S55140719A
Authority
JP
Japan
Prior art keywords
alumina
porcelain
manufacture
dipped
calcined
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.)
Pending
Application number
JP4898679A
Other languages
Japanese (ja)
Inventor
Yukio Oda
Tadashi Kokaji
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.)
Showa Aluminum Industries KK
Showa Keikinzoku KK
Original Assignee
Showa Aluminum Industries KK
Showa Keikinzoku KK
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 Showa Aluminum Industries KK, Showa Keikinzoku KK filed Critical Showa Aluminum Industries KK
Priority to JP4898679A priority Critical patent/JPS55140719A/en
Publication of JPS55140719A publication Critical patent/JPS55140719A/en
Pending legal-status Critical Current

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Landscapes

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

Abstract

PURPOSE: To obtain fine-grain high-purity α-Al2O3 of a low alkali content by heat treating Al(OH)3 to convert it into crystal-free amorphous alumina, which is then dipped in an aqueous soln. of an aliphatic lower carboxylic acid, washed, and calcined at a specified temp.
CONSTITUTION: Al(OH)3 is converted into crystal-free amorphous alumina by heat treatment. This alumina is then dipped in an aqueous soln. of an aliphatic lower carboxylic acid such as citric acid, oxalic acid or acetic acid, washed, and calcined at 1,100W1,300°C to obtain α-Al2O3 capable of being pulverized easily and finely to submicron region, exhibiting high sintering activity in manufacture of porcelain, and giving a sintered body with superior characteristics such as high density and high mechanical strength. This alumina is suitable for use as starting material for high aluminous porcelain with superior heat resistance, electrical insulating properties and mechanical strength for an ignition plug, electronic parts and other field.
COPYRIGHT: (C)1980,JPO&Japio
JP4898679A 1979-04-23 1979-04-23 Manufacture of starting material alumina for porcelain Pending JPS55140719A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4898679A JPS55140719A (en) 1979-04-23 1979-04-23 Manufacture of starting material alumina for porcelain

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4898679A JPS55140719A (en) 1979-04-23 1979-04-23 Manufacture of starting material alumina for porcelain

Publications (1)

Publication Number Publication Date
JPS55140719A true JPS55140719A (en) 1980-11-04

Family

ID=12818551

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4898679A Pending JPS55140719A (en) 1979-04-23 1979-04-23 Manufacture of starting material alumina for porcelain

Country Status (1)

Country Link
JP (1) JPS55140719A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5997528A (en) * 1982-08-24 1984-06-05 スイス・アルミニウム・リミテツド Manufacture of crystal alumina
JP2005263529A (en) * 2004-03-17 2005-09-29 Sumitomo Chemical Co Ltd Method for producing activated alumina having low alkali content
CN102009993A (en) * 2010-12-15 2011-04-13 中国铝业股份有限公司 Method for preparing submicron aluminium oxide by two-stage roasting method
US8124048B2 (en) 2006-12-15 2012-02-28 Nippon Light Metal Company, Ltd. Process for producing high-purity α-alumina

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5997528A (en) * 1982-08-24 1984-06-05 スイス・アルミニウム・リミテツド Manufacture of crystal alumina
JPH0465012B2 (en) * 1982-08-24 1992-10-16 Alusuisse
JP2005263529A (en) * 2004-03-17 2005-09-29 Sumitomo Chemical Co Ltd Method for producing activated alumina having low alkali content
US8124048B2 (en) 2006-12-15 2012-02-28 Nippon Light Metal Company, Ltd. Process for producing high-purity α-alumina
CN102009993A (en) * 2010-12-15 2011-04-13 中国铝业股份有限公司 Method for preparing submicron aluminium oxide by two-stage roasting method

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