GB1354884A - Polycrystalline solids - Google Patents

Polycrystalline solids

Info

Publication number
GB1354884A
GB1354884A GB1955870A GB1354884DA GB1354884A GB 1354884 A GB1354884 A GB 1354884A GB 1955870 A GB1955870 A GB 1955870A GB 1354884D A GB1354884D A GB 1354884DA GB 1354884 A GB1354884 A GB 1354884A
Authority
GB
United Kingdom
Prior art keywords
particles
solution
aluminium
alumina
anisometric
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
GB1955870A
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.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries Ltd
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 Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Publication of GB1354884A publication Critical patent/GB1354884A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D9/00—Crystallisation
    • B01D9/0036—Crystallisation on to a bed of product crystals; Seeding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D9/00—Crystallisation
    • B01D9/005—Selection of auxiliary, e.g. for control of crystallisation nuclei, of crystal growth, of adherence to walls; Arrangements for introduction thereof
    • 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
    • C01F7/021—After-treatment of oxides or hydroxides
    • 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
    • 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
    • C04B35/62236—Fibres based on aluminium oxide
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/10—Particle morphology extending in one dimension, e.g. needle-like
    • 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
    • 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
    • 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
    • C01P2004/64—Nanometer sized, i.e. from 1-100 nanometer

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Structural Engineering (AREA)
  • Nanotechnology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Composite Materials (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Geology (AREA)
  • Insulated Conductors (AREA)
  • Silicates, Zeolites, And Molecular Sieves (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)

Abstract

1354884 Alumina fibres IMPERIAL CHEMICAL INDUSTRIES Ltd 19 April 1971 [23 April 1970] 19558/70 Addition to 1314167 Heading C1A [Also in Division B1] In order to prevent spontaneous crystallization, in the presence of anisometric particles, and to delay the inception of the epitaxial growth of crystallites, on the anisometric particles of the parent Specification, until the particles have been oriented, a protective colloid is added to the growth solution. The particles are thereafter oriented by extrusion of the solution and the crystallites grown. Besides the anisometric particles of the parent Specification 1,314,167, aluminium silicate fibrils may be used. The following are disclosed as protective colloids which did not tend to flocculate the particles, polyethylene glycol or esters thereof, alkyl aryl sulphates, cellulose derivatives, polyethylene oxide or its condensates, naphthalene sulphonic acid formaldehyde condensation products, soluble proteins, polyvinyl pyrollidone, and hydroxylated polymers. In an example, Al powder is dissolved in a solution of AlCl 3 to give a solution of aluminium oxychloride. A colloidal gas of anisometric particles of aluminium monohydrate is formed from a portion of this solution by diluting and heating under pressure and is added to a solution of high molecular weight p.v.a. in water. The original aluminium oxychloride solution is seeded with the inhibited colloidal gel and evaporated under reduced pressure, until it has been reduced to a thick syrup. Magnesium chloride may be added before evaporation to limit the growth of the crystals. The syrup is extruded under N 2 pressure through a spinneret. The filament is drawn down to a diameter of 5-10 microns and placed in a furnace heated to 750‹ C. The alumina particles are all found to be aligned, since the aluminium oxychloride decomposed to alumina crystallites, which are oriented in the same direction as the alumina particles formed from the anisometric particles. The fibres may be soaked in an ethanol solution of ethyl silicate and re-fired at 1500‹ C., to give a fibre containing silica. The fibres are used in fireproof textiles and for thermal insulation.
GB1955870A 1970-04-23 1970-04-23 Polycrystalline solids Expired GB1354884A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1955870 1970-04-23

Publications (1)

Publication Number Publication Date
GB1354884A true GB1354884A (en) 1974-06-05

Family

ID=10131382

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1955870A Expired GB1354884A (en) 1970-04-23 1970-04-23 Polycrystalline solids

Country Status (9)

Country Link
AU (1) AU2801371A (en)
BE (1) BE766081A (en)
BR (1) BR7102392D0 (en)
DE (1) DE2119886A1 (en)
FR (1) FR2090593A5 (en)
GB (1) GB1354884A (en)
IL (1) IL36646A0 (en)
NL (1) NL7105452A (en)
ZA (1) ZA712371B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008125271A2 (en) * 2007-04-16 2008-10-23 Clariant Finance (Bvi) Limited Spinning material for the production of oxide ceramic fibers

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1417791A (en) * 1972-06-30 1975-12-17 Du Pont Fibres
DE3870637D1 (en) * 1987-01-29 1992-06-11 Sumitomo Chemical Co METHOD FOR PRODUCING ALUMINUM OXIDE.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008125271A2 (en) * 2007-04-16 2008-10-23 Clariant Finance (Bvi) Limited Spinning material for the production of oxide ceramic fibers
WO2008125271A3 (en) * 2007-04-16 2009-04-23 Clariant Finance Bvi Ltd Spinning material for the production of oxide ceramic fibers

Also Published As

Publication number Publication date
BR7102392D0 (en) 1973-05-03
ZA712371B (en) 1972-01-26
AU2801371A (en) 1972-10-26
NL7105452A (en) 1971-10-26
FR2090593A5 (en) 1972-01-14
IL36646A0 (en) 1971-06-23
BE766081A (en) 1971-10-21
DE2119886A1 (en) 1971-12-09

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee