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) M

Info

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
Application number
FR898901341A
Other languages
French (fr)
Other versions
FR2626587A1 (en
Inventor
Janos Csige
Jozsef Matyasi
Gyoergy Kaptay
Laszlo Lengyel
Laszlo Revesz
Miklos Schlegel
Maria Benjamin
Istvan Ori
Jozsef T Toth
Imre Toth
Sandor Pirik
Sandor Nemeth
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.)
MAGYAR ALUMINIUM
Magyar Aluminiumipari Troeszt
Original Assignee
MAGYAR ALUMINIUM
Magyar Aluminiumipari Troeszt
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 MAGYAR ALUMINIUM, Magyar Aluminiumipari Troeszt filed Critical MAGYAR ALUMINIUM
Publication of FR2626587A1 publication Critical patent/FR2626587A1/en
Application granted granted Critical
Publication of FR2626587B1 publication Critical patent/FR2626587B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Metallurgy (AREA)
  • Inorganic Chemistry (AREA)
  • Ceramic Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Manufacturing & Machinery (AREA)
  • Structural Engineering (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
FR898901341A 1988-02-03 1989-02-02 PROCESS FOR THE PREPARATION OF SINGLE CRYSTAL ALUMINA OF A SIZE LESS THAN 1 (MY) M Expired - Fee Related FR2626587B1 (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
DE3902323A1 (en) 1989-08-17
DE3902323C2 (en) 1995-07-20
HU210595B (en) 1995-05-29
FR2626587A1 (en) 1989-08-04
HUT66758A (en) 1994-12-28

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Legal Events

Date Code Title Description
ST Notification of lapse