IL95719A0 - Microcrystals of alpha-alumina in the form of platelets and their production - Google Patents
Microcrystals of alpha-alumina in the form of platelets and their productionInfo
- Publication number
- IL95719A0 IL95719A0 IL95719A IL9571990A IL95719A0 IL 95719 A0 IL95719 A0 IL 95719A0 IL 95719 A IL95719 A IL 95719A IL 9571990 A IL9571990 A IL 9571990A IL 95719 A0 IL95719 A0 IL 95719A0
- Authority
- IL
- Israel
- Prior art keywords
- alumina
- alpha
- platelets
- microcrystals
- production
- Prior art date
Links
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
-
- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
- C30B29/10—Inorganic compounds or compositions
- C30B29/16—Oxides
- C30B29/20—Aluminium oxides
-
- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B9/00—Single-crystal growth from melt solutions using molten solvents
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/20—Particle morphology extending in two dimensions, e.g. plate-like
- C01P2004/22—Particle morphology extending in two dimensions, e.g. plate-like with a polygonal circumferential shape
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/54—Particles characterised by their aspect ratio, i.e. the ratio of sizes in the longest to the shortest dimension
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
- Paper (AREA)
Abstract
Macrocrystals of alpha alumina in the form of monocrystalline hexagonal platelets. The invention also relates to a process for the manufacture of these macrocrystals by calcination of alumina, for example transition alumina, and in the presence of a fluorine-containing flux, at a relatively low temperature. The macrocrystals of alpha alumina can be employed as reinforcing materials.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8912402A FR2652075B1 (en) | 1989-09-21 | 1989-09-21 | ALPHA ALUMINA MACROCRYSTALS IN THE FORM OF PLATES AND PROCESS FOR OBTAINING SAME. |
Publications (1)
Publication Number | Publication Date |
---|---|
IL95719A0 true IL95719A0 (en) | 1991-06-30 |
Family
ID=9385725
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IL95719A IL95719A0 (en) | 1989-09-21 | 1990-09-18 | Microcrystals of alpha-alumina in the form of platelets and their production |
Country Status (15)
Country | Link |
---|---|
EP (1) | EP0425325B1 (en) |
JP (1) | JP2564205B2 (en) |
KR (1) | KR950003419B1 (en) |
CN (1) | CN1047576C (en) |
AT (1) | ATE98304T1 (en) |
AU (1) | AU627933B2 (en) |
CA (1) | CA2025037A1 (en) |
DD (1) | DD295885A5 (en) |
DE (1) | DE69005077T2 (en) |
DK (1) | DK0425325T3 (en) |
ES (1) | ES2060108T3 (en) |
FR (1) | FR2652075B1 (en) |
IE (1) | IE903320A1 (en) |
IL (1) | IL95719A0 (en) |
NO (1) | NO903690L (en) |
Families Citing this family (30)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU639326B2 (en) * | 1990-05-23 | 1993-07-22 | Atochem | Ceramic preforms comprising monocrystalline hexagonal platelets of alpha-alumina, their production and applications thereof |
WO1993024681A1 (en) * | 1992-06-02 | 1993-12-09 | Sumitomo Chemical Company, Limited | α-ALUMINA |
CA2099734A1 (en) * | 1992-07-01 | 1994-01-02 | Akihiko Takahashi | Process for preparing polyhedral alpha-alumina particles |
RU2136596C1 (en) | 1993-11-25 | 1999-09-10 | Сумитомо Кемикал Компани, Лимитед | Method of preparing alpha-aluminum powder and alpha-aluminum powder |
FR2715169B1 (en) * | 1994-01-14 | 1996-04-05 | Atochem Elf Sa | Macrocrystals containing aluminum nitride in the form of platelets, their preparation process and their uses. |
JP3416855B2 (en) * | 1994-04-15 | 2003-06-16 | 株式会社フジミインコーポレーテッド | Polishing composition and polishing method |
AU699077B2 (en) * | 1995-02-21 | 1998-11-19 | Sumitomo Chemical Company, Limited | Alpha-alumina and method for producing the same |
FR2734812B1 (en) * | 1995-05-31 | 1997-07-04 | Atochem Elf Sa | PROCESS FOR THE PREPARATION OF CERAMIC DRILL PARTS COMPRISING SINGLE-CRYSTAL ALPHA ALUMINUM WAFERS |
TW460548B (en) * | 1998-12-23 | 2001-10-21 | Merck Patent Gmbh | Pigment mixture |
JP4270848B2 (en) * | 2002-11-08 | 2009-06-03 | 昭和電工株式会社 | Alumina particles and method for producing the same |
AU2003900030A0 (en) | 2003-01-07 | 2003-01-23 | Advanced Nano Technologies Pty Ltd | Process for the production of ultrafine plate-like alumina particles |
KR100555751B1 (en) | 2004-01-05 | 2006-03-03 | 삼성전자주식회사 | Process cartridge for image forming apparatus |
JP4841851B2 (en) * | 2005-03-02 | 2011-12-21 | 電気化学工業株式会社 | Alumina and production method thereof |
CN100348494C (en) * | 2005-08-26 | 2007-11-14 | 郑州大学 | High dispersibility alpha-Al2O3 nanometer powder preparation method |
JP5211467B2 (en) * | 2006-11-22 | 2013-06-12 | 日本軽金属株式会社 | Method for producing polyhedral α-alumina |
KR100803049B1 (en) * | 2007-08-31 | 2008-02-22 | (주)제이피에스 마이크로텍 | Manufacture method of flake aluminum oxide using microwave |
DE102009014638A1 (en) | 2009-03-24 | 2010-09-30 | Clariant International Ltd. | Laminates containing hard, plate-shaped minerals |
JPWO2013133300A1 (en) * | 2012-03-09 | 2015-07-30 | 旭硝子株式会社 | Glass ceramic body, laminate, portable electronic device casing, and portable electronic device |
JP5720848B2 (en) * | 2012-09-28 | 2015-05-20 | Dic株式会社 | Method for producing polyhedral α-alumina fine particles |
CN102924092A (en) * | 2012-10-24 | 2013-02-13 | 江苏大学 | Low-cost and pollution-free preparation method for highly dispersed flaky alumina |
JP6229661B2 (en) * | 2012-11-07 | 2017-11-15 | 旭硝子株式会社 | Glass ceramic substrate and casing for portable electronic device using the substrate |
JP6646864B2 (en) * | 2015-06-01 | 2020-02-14 | Dic株式会社 | Method for producing plate-like alumina particles |
CN104925843A (en) * | 2015-06-03 | 2015-09-23 | 清华大学 | Method for preparing laminar alpha-Al2O3 pearlescent pigment base material by use of compound aluminum salt |
CN108560052B (en) * | 2018-04-26 | 2020-05-01 | 闽江学院 | Preparation method and application of monocrystal hexagonal alumina |
US20220081310A1 (en) * | 2019-01-25 | 2022-03-17 | Dic Corporation | Tabular alumina particle and method for manufacturing tabular alumina particle |
JP6708281B2 (en) * | 2019-03-27 | 2020-06-10 | Dic株式会社 | Plate-shaped alumina particles |
EP4041828A1 (en) | 2019-10-09 | 2022-08-17 | DIC Corporation | Plate-like alumina particle and method for manufacturing plate-like alumina particle |
US20230096825A1 (en) * | 2019-10-09 | 2023-03-30 | Dic Corporation | Plate-like alumina particle and method for manufacturing plate-like alumina particle |
CN110938862A (en) * | 2019-12-23 | 2020-03-31 | 苏州纳迪微电子有限公司 | High-purity monocrystalline corundum powder and preparation method thereof |
CN114057505B (en) * | 2021-12-13 | 2023-02-28 | 西安邮电大学 | Preparation method of porous flaky alumina framework |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB935390A (en) * | 1960-12-20 | 1963-08-28 | Gen Electric Co Ltd | Improvements in or relating to the manufacture of corundum crystals |
JPS5215498A (en) * | 1975-07-28 | 1977-02-05 | Showa Denko Kk | Process for production of granular corrundum |
DE2623482C2 (en) * | 1976-05-26 | 1985-06-27 | Alcoa Chemie GmbH, 6700 Ludwigshafen | Process for the production of a crystalline aluminum oxide for polishing, lapping and grinding media |
DE2850064B1 (en) * | 1978-11-18 | 1980-05-08 | Giulini Chemie | Hexagonal tabular alpha alumina single crystals and process for their manufacture |
JPS5819640A (en) * | 1981-07-27 | 1983-02-04 | Matsushita Electric Ind Co Ltd | Temperature control device of air conditioners etc. |
JPS6033763A (en) * | 1983-08-05 | 1985-02-21 | Nippon Telegr & Teleph Corp <Ntt> | Speed selecting communication system |
JPS6054916A (en) * | 1983-09-06 | 1985-03-29 | 坂東 尚周 | Hexagonal flake a-al203 particle and manufacture |
JPS6433055A (en) * | 1987-07-27 | 1989-02-02 | Sumitomo Cement Co | Sintered body of alumina having high strength and its production |
US5009676A (en) * | 1989-04-28 | 1991-04-23 | Norton Company | Sintered sol gel alumina abrasive filaments |
JP3207739B2 (en) * | 1996-01-19 | 2001-09-10 | 松下電器産業株式会社 | Image playback device |
-
1989
- 1989-09-21 FR FR8912402A patent/FR2652075B1/en not_active Expired - Lifetime
-
1990
- 1990-08-22 NO NO90903690A patent/NO903690L/en unknown
- 1990-09-11 CA CA002025037A patent/CA2025037A1/en not_active Abandoned
- 1990-09-12 IE IE332090A patent/IE903320A1/en unknown
- 1990-09-17 DD DD90344059A patent/DD295885A5/en not_active IP Right Cessation
- 1990-09-18 KR KR1019900014770A patent/KR950003419B1/en not_active IP Right Cessation
- 1990-09-18 IL IL95719A patent/IL95719A0/en unknown
- 1990-09-19 JP JP2249896A patent/JP2564205B2/en not_active Expired - Fee Related
- 1990-09-20 DE DE69005077T patent/DE69005077T2/en not_active Expired - Fee Related
- 1990-09-20 EP EP90402599A patent/EP0425325B1/en not_active Expired - Lifetime
- 1990-09-20 AU AU62697/90A patent/AU627933B2/en not_active Ceased
- 1990-09-20 ES ES90402599T patent/ES2060108T3/en not_active Expired - Lifetime
- 1990-09-20 AT AT90402599T patent/ATE98304T1/en not_active IP Right Cessation
- 1990-09-20 DK DK90402599.6T patent/DK0425325T3/en active
- 1990-09-21 CN CN90107756A patent/CN1047576C/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
CA2025037A1 (en) | 1991-03-22 |
IE903320A1 (en) | 1991-04-10 |
EP0425325A1 (en) | 1991-05-02 |
NO903690L (en) | 1991-03-22 |
DD295885A5 (en) | 1991-11-14 |
KR910006145A (en) | 1991-04-27 |
ATE98304T1 (en) | 1993-12-15 |
DE69005077T2 (en) | 1994-05-26 |
CN1047576C (en) | 1999-12-22 |
JP2564205B2 (en) | 1996-12-18 |
FR2652075B1 (en) | 1991-12-06 |
EP0425325B1 (en) | 1993-12-08 |
DE69005077D1 (en) | 1994-01-20 |
CN1050366A (en) | 1991-04-03 |
JPH03131517A (en) | 1991-06-05 |
AU627933B2 (en) | 1992-09-03 |
NO903690D0 (en) | 1990-08-22 |
DK0425325T3 (en) | 1994-02-14 |
ES2060108T3 (en) | 1994-11-16 |
AU6269790A (en) | 1991-04-11 |
FR2652075A1 (en) | 1991-03-22 |
KR950003419B1 (en) | 1995-04-12 |
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