GB1296198A - - Google Patents

Info

Publication number
GB1296198A
GB1296198A GB1296198DA GB1296198A GB 1296198 A GB1296198 A GB 1296198A GB 1296198D A GB1296198D A GB 1296198DA GB 1296198 A GB1296198 A GB 1296198A
Authority
GB
United Kingdom
Prior art keywords
whiskers
powder
thickness
quartz
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
Application number
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 filed Critical
Publication of GB1296198A publication Critical patent/GB1296198A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • C30B11/00—Single-crystal growth by normal freezing or freezing under temperature gradient, e.g. Bridgman-Stockbarger method
    • C30B11/04—Single-crystal growth by normal freezing or freezing under temperature gradient, e.g. Bridgman-Stockbarger method adding crystallising materials or reactants forming it in situ to the melt
    • C30B11/08—Single-crystal growth by normal freezing or freezing under temperature gradient, e.g. Bridgman-Stockbarger method adding crystallising materials or reactants forming it in situ to the melt every component of the crystal composition being added during the crystallisation
    • C30B11/12—Vaporous components, e.g. vapour-liquid-solid-growth
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S117/00—Single-crystal, oriented-crystal, and epitaxy growth processes; non-coating apparatus therefor
    • Y10S117/90—Apparatus characterized by composition or treatment thereof, e.g. surface finish, surface coating
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S264/00—Plastic and nonmetallic article shaping or treating: processes
    • Y10S264/19—Inorganic fiber

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)

Abstract

1296198 Growing whisker-like crystals PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 29 Jan 1970 [1 Feb 1969] 4360/70 Heading C1A Crystals in the form of whiskers, having an average thickness up to 100 millimicrons (mÁ) and a length at least 10 times larger than the thickness, are grown from a gaseous atmosphere containing the crystal material (or reagents which react to form the crystal material) on the surface of a substrate which is uniformly rough due to projecting crystallites, the lateral dimensions of which approximately correspond to the thickness of the whiskers to be grown. In an example, a plate formed by sintering silicon carbide powder is dusted with iron powder, having a grain size smaller than 1 mÁ, and is placed in a bed of quartz powder in a graphite crucible which is heated at 1280‹ C. in a quartz tube through which hydrogen is passed. Whiskers of silicon carbide, of diameter 1 mÁ and length 20 mm., grow on the plate in 10 hours. In another example, tablets 11 of compressed aluminium oxide powder, having a grain size of 0À01 to 0À1 mÁ, and alumina crucibles 12 filled with aluminium 13 are placed on a bed of quartz grains 14 in an alumina boat 15. The assembly is surrounded by an alumina tube 16 through which hydrogen is led, and heated at 1300‹ C. Crystallites of aluminium form on tablets 11, and ribbon-shaped aluminium oxide whiskers grow thereon. Other examples relate to the production of whiskers of silicon nitride, and of silicon.
GB1296198D 1969-02-01 1970-01-29 Expired GB1296198A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6901661A NL6901661A (en) 1969-02-01 1969-02-01

Publications (1)

Publication Number Publication Date
GB1296198A true GB1296198A (en) 1972-11-15

Family

ID=19806044

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1296198D Expired GB1296198A (en) 1969-02-01 1970-01-29

Country Status (11)

Country Link
US (1) US3692478A (en)
AU (1) AU1084970A (en)
BE (1) BE745305A (en)
CA (1) CA927720A (en)
CH (1) CH558207A (en)
DE (1) DE2003959A1 (en)
ES (1) ES376059A1 (en)
FR (1) FR2033816A5 (en)
GB (1) GB1296198A (en)
NL (1) NL6901661A (en)
SE (1) SE348650B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4532182A (en) * 1981-12-29 1985-07-30 Atlantic Richfield Company Silicon carbide whisker sheet composites
US4536379A (en) * 1983-06-02 1985-08-20 Graphite Sales, Inc. Production of silicon carbide
US4873069A (en) * 1987-03-09 1989-10-10 American Matrix, Inc. Method for the preparation of silicon carbide whiskers
US4911781A (en) * 1987-05-05 1990-03-27 The Standard Oil Company VLS Fiber growth process
US5404836A (en) * 1989-02-03 1995-04-11 Milewski; John V. Method and apparatus for continuous controlled production of single crystal whiskers

Also Published As

Publication number Publication date
FR2033816A5 (en) 1970-12-04
CA927720A (en) 1973-06-05
AU1084970A (en) 1971-08-05
DE2003959A1 (en) 1970-08-06
BE745305A (en) 1970-07-30
CH558207A (en) 1975-01-31
NL6901661A (en) 1970-08-04
SE348650B (en) 1972-09-11
ES376059A1 (en) 1972-05-16
US3692478A (en) 1972-09-19

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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