GB1511393A - Process for producing monocrystalline whiskers of magnesium aluminate spinel - Google Patents

Process for producing monocrystalline whiskers of magnesium aluminate spinel

Info

Publication number
GB1511393A
GB1511393A GB21385/76A GB2138576A GB1511393A GB 1511393 A GB1511393 A GB 1511393A GB 21385/76 A GB21385/76 A GB 21385/76A GB 2138576 A GB2138576 A GB 2138576A GB 1511393 A GB1511393 A GB 1511393A
Authority
GB
United Kingdom
Prior art keywords
magnesia
alumina
whiskers
graphite
sulphide
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
GB21385/76A
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.)
LE TEKHNOLOG I IM LENSOVETA
Original Assignee
LE TEKHNOLOG I IM LENSOVETA
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 LE TEKHNOLOG I IM LENSOVETA filed Critical LE TEKHNOLOG I IM LENSOVETA
Priority to GB21385/76A priority Critical patent/GB1511393A/en
Publication of GB1511393A publication Critical patent/GB1511393A/en
Expired 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
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/62227—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products obtaining fibres
    • C04B35/62231—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products obtaining fibres based on oxide ceramics
    • 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
    • C30B25/00—Single-crystal growth by chemical reaction of reactive gases, e.g. chemical vapour-deposition growth
    • C30B25/005—Growth of whiskers or needles
    • 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

Abstract

1511393 Spinel whiskers LENIGRAD TEKHNOLOGICHE INST IM LENSOVETA 24 May 1976 21385/76 Heading C1A Spinel whiskers are made by calcining magnesia and alumina at 1300-1800‹C in air in an enclosed space in the presence of a carbonaceous material, the whiskers growing on the alumina surface. The reaction is preferably performed in the presence of aluminium sulphide which is present in the ratio of sulphide : magnesia of 1:5-10. The carbonaceous material may be solid carbon, preferably graphite, or a gas such as CO or CO 2 . In one embodiment a column of stacked tablets of magnesia is inserted along the axis of a cylindrical alumina vessel and graphite is poured into the bottom of the vessel. Certain of the magnesia tablets may be replaced with tablets of aluminium sulphide or a single moulding of magnesia or mixture of magnesia and aluminium sulphide may be employed. In another embodiment tubular members of alumina and magnesia are arranged alternately in concentric circles and the arrangement is placed between two graphite plates. In a further embodiment a plate of alumina and a plate of magnesia are spaced by graphite plates. Any of these constructions are then placed in the furnace for calcination. Preferably the distance between the magnesia and alumina is less than 30 mm.
GB21385/76A 1976-05-24 1976-05-24 Process for producing monocrystalline whiskers of magnesium aluminate spinel Expired GB1511393A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB21385/76A GB1511393A (en) 1976-05-24 1976-05-24 Process for producing monocrystalline whiskers of magnesium aluminate spinel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB21385/76A GB1511393A (en) 1976-05-24 1976-05-24 Process for producing monocrystalline whiskers of magnesium aluminate spinel

Publications (1)

Publication Number Publication Date
GB1511393A true GB1511393A (en) 1978-05-17

Family

ID=10162031

Family Applications (1)

Application Number Title Priority Date Filing Date
GB21385/76A Expired GB1511393A (en) 1976-05-24 1976-05-24 Process for producing monocrystalline whiskers of magnesium aluminate spinel

Country Status (1)

Country Link
GB (1) GB1511393A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104141180A (en) * 2014-07-22 2014-11-12 南京理工大学 Preparing method for continuous magnesium aluminate spinel fibers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104141180A (en) * 2014-07-22 2014-11-12 南京理工大学 Preparing method for continuous magnesium aluminate spinel fibers

Similar Documents

Publication Publication Date Title
IE41507L (en) Magnesium aluminium spinel
SE7501003L (en)
GB1511393A (en) Process for producing monocrystalline whiskers of magnesium aluminate spinel
IE40249B1 (en) Improvements in calcining calcium sulphate dihydrate
GB1000080A (en) Volume stable refractory and method of making same
ES410611A1 (en) Gas reactors including foam-structured ceramic body with integral internal ceramic baffles
AU463315B2 (en) Process forthe removal of carbon dioxide andor hydrogen sulphide andother acidic gases from gas mixtures
GB1199013A (en) Refractory Ramming Mix Composition and process of Forming Refractory Surface
GB1065235A (en) Improvements in or relating to apparatus for and method of carrying out endothermic gas reactions
GB1323594A (en) Process for the manufacture and apparatus for the use of shaped catalysts or acceptors
ES454608A1 (en) Air lock filter system
GB1203067A (en) Method of producing highly gas-permeable refractory material having open pores
MX172108B (en) DEVICE FOR INJECTION OF GASES IN METALLURGICAL CONTAINERS
GB1049814A (en) Lining for metallurgical vessels
IT1015605B (en) PROCEDURE FOR PRODUCING STEELS WITH HIGH CHROME CONTENT AND VERY LOW CARBON CONTENT
GB1353563A (en) Refractory material
GB1423624A (en) Refractory grains
GB1112735A (en) Process of producing refractory,particularly unfired,magnesia-chrome and chrome-magnesia bricks
US3071454A (en) Apparatus for reforming gases
GB1435088A (en) Fixed bed coal gasification
GB1121823A (en) Improvements in the production of alumina spinel whiskers
JPS5334804A (en) Fluidizing vessels
SU637383A1 (en) Refractory mass for guniting lining of metallurgical plants
Pitak et al. Effect of nickel nitrate on phase changes in mullite and mullite—Corundum refractories when heated in oxidizing and reducing conditions
Terenyi The Use of Refractory Linings With Silicon Oxy- Nitride Binder in Aluminum Electrolysis Baths

Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee