JPS55140719A - Manufacture of starting material alumina for porcelain - Google Patents
Manufacture of starting material alumina for porcelainInfo
- 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
Links
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
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)
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 |
-
1979
- 1979-04-23 JP JP4898679A patent/JPS55140719A/en active Pending
Cited By (5)
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 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS55140719A (en) | Manufacture of starting material alumina for porcelain | |
KR840008643A (en) | High density magnesia clinker and its manufacturing method | |
DE59005617D1 (en) | Process for producing a starting powder used in the production of a varistor and starting powder produced according to this process. | |
JPS62187156A (en) | Manufacture of high insulation high alumina ceramic composition | |
KR890005908A (en) | Method for preparing superconducting material and obtained superconducting material | |
JPS54142597A (en) | Piezo-electric porcelain composite | |
JPS6366795B2 (en) | ||
JPH05174627A (en) | High frequency dielectric porcelain composition | |
JPS5311245A (en) | Spark plug | |
Day et al. | A High Temperature Low Thermal Expansion Ceramic and Method for the Production Thereof | |
JPS5388698A (en) | Production of beta-iron oxyhydroxide powder | |
JPS57118018A (en) | Magnesia suitable for magnesia cement and its manufacture | |
Daimon et al. | EFFECTS OF ZRO 2 ULTRAFINE PARTICLE ADDITIVE ON THE FORMATION OF AL 2 O 3 FROM SULPHATE. | |
Cho et al. | EFFECT OF MgO ADDITION ON MULLITE | |
GB1339112A (en) | Method of manufacturing electrically conductive material | |
Kochetova et al. | The sintering of kyanite and sillimanite | |
JPS54161100A (en) | High dielectric constant ceramic composition | |
JPS5351497A (en) | Production of high dencity ni-zn ferrite | |
Rangaswamy et al. | Superconductive Powder and Method of Making Superconductive Powder | |
KATCHALOVA | STRUCTURE AND PROPERTIES OF ALUMINA DOPED WITH MGO DURING THE HYDROLYSIS OF AL | |
JPS54106896A (en) | Manufacture of lead titanate piezo-electric ceramics | |
JPS5331598A (en) | Production of magnetic powder | |
JPS54161099A (en) | High dielectric constant ceramic composition | |
JPS527000A (en) | Dielectric porcelain manufacture method | |
GB919051A (en) | Improvements in or relating to the manufacture of sintered copper bodies |