GB1210900A - Method of making spinel powder for use in forming sintered spinel bodies - Google Patents

Method of making spinel powder for use in forming sintered spinel bodies

Info

Publication number
GB1210900A
GB1210900A GB04101/69A GB1410169A GB1210900A GB 1210900 A GB1210900 A GB 1210900A GB 04101/69 A GB04101/69 A GB 04101/69A GB 1410169 A GB1410169 A GB 1410169A GB 1210900 A GB1210900 A GB 1210900A
Authority
GB
United Kingdom
Prior art keywords
spinel
aluminium
powder
magnesium
solution
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
Application number
GB04101/69A
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.)
CBS Corp
Original Assignee
Westinghouse Electric Corp
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 Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Publication of GB1210900A publication Critical patent/GB1210900A/en
Expired legal-status Critical Current

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
    • C01F7/16—Preparation of alkaline-earth metal aluminates or magnesium aluminates; Aluminium oxide or hydroxide therefrom
    • C01F7/162—Magnesium 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
    • C30B29/22—Complex oxides
    • C30B29/26—Complex oxides with formula BMe2O4, wherein B is Mg, Ni, Co, Al, Zn, or Cd and Me is Fe, Ga, Sc, Cr, Co, or Al
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2002/00—Crystal-structural characteristics
    • C01P2002/60—Compounds characterised by their crystallite size

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Abstract

1,210,900. Spinel powder. WESTING- HOUSE ELECTRIC CORP. 18 March, 1969 [28 March, 1968], No. 14101/69. Heading C1A. Spinel powder is prepared by coprecipitating at a pH between 9À5 and 10, aluminium and magnesium from a hot aqueous solution containing aluminium and magnesium ions in the gram ratio of 2: 1 and firing the precipitate at a temperature between 400‹ and 1400‹ C. in order to totally convert the precipitate to a crystalline powder of spinel. In one embodiment a hot solution of aluminium and magnesium chloride is added to a buffered alkaline solution, containing preferably ammonium hydroxide and chloride, the pH of the latter being maintained by the addition of more alkaline solution. Alternatively an alkaline solution containing ammonium hydroxide is added to a solution containing aluminium, and magnesium ions and also an amount of oxalate ions equivalent to the amount of magnesium ions, in order to bring the pH of the latter solution to between 9À5 and 10. In the second case firing at 750-1400‹ C. is preferred and in both cases 800-1200‹ C. is most preferred.
GB04101/69A 1968-03-28 1969-03-18 Method of making spinel powder for use in forming sintered spinel bodies Expired GB1210900A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US71690768A 1968-03-28 1968-03-28

Publications (1)

Publication Number Publication Date
GB1210900A true GB1210900A (en) 1970-11-04

Family

ID=24879942

Family Applications (1)

Application Number Title Priority Date Filing Date
GB04101/69A Expired GB1210900A (en) 1968-03-28 1969-03-18 Method of making spinel powder for use in forming sintered spinel bodies

Country Status (1)

Country Link
GB (1) GB1210900A (en)

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees