FR2626587B1 - PROCESS FOR THE PREPARATION OF SINGLE CRYSTAL ALUMINA OF A SIZE LESS THAN 1 (MY) M - Google Patents
PROCESS FOR THE PREPARATION OF SINGLE CRYSTAL ALUMINA OF A SIZE LESS THAN 1 (MY) MInfo
- Publication number
- FR2626587B1 FR2626587B1 FR898901341A FR8901341A FR2626587B1 FR 2626587 B1 FR2626587 B1 FR 2626587B1 FR 898901341 A FR898901341 A FR 898901341A FR 8901341 A FR8901341 A FR 8901341A FR 2626587 B1 FR2626587 B1 FR 2626587B1
- Authority
- FR
- France
- Prior art keywords
- preparation
- single crystal
- size less
- crystal alumina
- alumina
- 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.)
- Expired - Fee Related
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
- C04B35/111—Fine ceramics
-
- 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
- C01F7/442—Dehydration of aluminium oxide or hydroxide, i.e. all conversions of one form into another involving a loss of water by calcination in presence of a calcination additive
-
- 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
- C30B7/00—Single-crystal growth from solutions using solvents which are liquid at normal temperature, e.g. aqueous solutions
-
- 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)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Metallurgy (AREA)
- Ceramic Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Geology (AREA)
- Structural Engineering (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
HU88504A HU210595B (en) | 1988-02-03 | 1988-02-03 | Process for producing aluminiume-oxides using to the ceramic which contains smaller than 1 micrometer one-crystalsize grains, too |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2626587A1 FR2626587A1 (en) | 1989-08-04 |
FR2626587B1 true FR2626587B1 (en) | 1994-06-17 |
Family
ID=10949888
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR898901341A Expired - Fee Related FR2626587B1 (en) | 1988-02-03 | 1989-02-02 | PROCESS FOR THE PREPARATION OF SINGLE CRYSTAL ALUMINA OF A SIZE LESS THAN 1 (MY) M |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE3902323C2 (en) |
FR (1) | FR2626587B1 (en) |
HU (1) | HU210595B (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE69208753T2 (en) * | 1991-07-09 | 1996-09-26 | Agency Ind Science Techn | Process for the production of fine platelet-shaped particles as well as plastic materials based on aluminum oxide |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2450232A1 (en) * | 1979-02-28 | 1980-09-26 | Pechiney Aluminium | PROCESS FOR THE CONVERSION OF HYDRARGILITY TO BOEHMITE |
HU185474B (en) * | 1981-11-10 | 1985-02-28 | Almasfuezitoei Timfoeldgyar | Process for preparing alpha-aluminium oxyde poor in alkali for ceramic purposes |
-
1988
- 1988-02-03 HU HU88504A patent/HU210595B/en not_active IP Right Cessation
-
1989
- 1989-01-26 DE DE3902323A patent/DE3902323C2/en not_active Expired - Fee Related
- 1989-02-02 FR FR898901341A patent/FR2626587B1/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
HUT66758A (en) | 1994-12-28 |
HU210595B (en) | 1995-05-29 |
DE3902323A1 (en) | 1989-08-17 |
FR2626587A1 (en) | 1989-08-04 |
DE3902323C2 (en) | 1995-07-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |