GB1481091A - Production of high-density boron nitride - Google Patents

Production of high-density boron nitride

Info

Publication number
GB1481091A
GB1481091A GB33349/74A GB3334974A GB1481091A GB 1481091 A GB1481091 A GB 1481091A GB 33349/74 A GB33349/74 A GB 33349/74A GB 3334974 A GB3334974 A GB 3334974A GB 1481091 A GB1481091 A GB 1481091A
Authority
GB
United Kingdom
Prior art keywords
boron nitride
density boron
production
density
crystals
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
GB33349/74A
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Publication of GB1481091A publication Critical patent/GB1481091A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J3/00—Processes of utilising sub-atmospheric or super-atmospheric pressure to effect chemical or physical change of matter; Apparatus therefor
    • B01J3/06—Processes using ultra-high pressure, e.g. for the formation of diamonds; Apparatus therefor, e.g. moulds or dies
    • B01J3/08—Application of shock waves for chemical reactions or for modifying the crystal structure of substances
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B21/00—Nitrogen; Compounds thereof
    • C01B21/06—Binary compounds of nitrogen with metals, with silicon, or with boron, or with carbon, i.e. nitrides; Compounds of nitrogen with more than one metal, silicon or boron
    • C01B21/064—Binary compounds of nitrogen with metals, with silicon, or with boron, or with carbon, i.e. nitrides; Compounds of nitrogen with more than one metal, silicon or boron with boron
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2203/00—Processes utilising sub- or super atmospheric pressure
    • B01J2203/06—High pressure synthesis
    • B01J2203/065—Composition of the material produced
    • B01J2203/066—Boronitrides
    • 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
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/10—Solid density
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/21—Attrition-index or crushing strength of granulates

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Ceramic Products (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Inorganic Fibers (AREA)
  • Liquid Crystal Substances (AREA)

Abstract

A process is described for preparing high-density boron nitride crystals from low-density boron nitride crystals for use as abrasive particles. The process starts from recrystallised, pyrolytic boron nitride. This is subjected to a dynamic shock treatment in such a way that pressure and temperature conditions are generated therein, in which the high-density boron nitride modification is stable. The high-density boron nitride particles thus obtained have a particle size of at least 50 mu m. <IMAGE>
GB33349/74A 1973-09-06 1974-07-29 Production of high-density boron nitride Expired GB1481091A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US39463273A 1973-09-06 1973-09-06

Publications (1)

Publication Number Publication Date
GB1481091A true GB1481091A (en) 1977-07-27

Family

ID=23559768

Family Applications (1)

Application Number Title Priority Date Filing Date
GB33349/74A Expired GB1481091A (en) 1973-09-06 1974-07-29 Production of high-density boron nitride

Country Status (13)

Country Link
JP (1) JPS5516087B2 (en)
AT (1) AT375895B (en)
BE (1) BE818940A (en)
CA (1) CA1006328A (en)
CH (1) CH608769A5 (en)
DE (1) DE2441299C2 (en)
FR (1) FR2243150B1 (en)
GB (1) GB1481091A (en)
IE (1) IE39632B1 (en)
IT (1) IT1020282B (en)
NO (2) NO138626C (en)
SE (2) SE413498B (en)
ZA (1) ZA744805B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS608966B2 (en) * 1976-01-26 1985-03-07 株式会社井上ジャパックス研究所 Synthesis method of cubic boron nitride
IN150013B (en) * 1977-07-01 1982-06-26 Gen Electric
WO1982000458A1 (en) * 1980-07-31 1982-02-18 Apollonov V Method of obtaining diamond and/or diamond-like modifications of boron nitride

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1281002A (en) * 1968-06-28 1972-07-12 Du Pont Method of subjecting solids to high dynamic pressures
DE2108452B2 (en) * 1970-02-23 1977-02-24 Showa Denko KiC.; Nippon Oils & Fats Co., Ltd.; Tokio PROCESS FOR THE PRODUCTION OF BORNITRIDE OF THE WURTZITE TYPE
CH580539A5 (en) * 1971-07-19 1976-10-15 I Khim Fiz Akademii Nauk Sssr
JPS517349B2 (en) * 1972-02-29 1976-03-06
JPS5720433B2 (en) * 1973-05-23 1982-04-28

Also Published As

Publication number Publication date
FR2243150B1 (en) 1978-07-13
BE818940A (en) 1974-12-16
IT1020282B (en) 1977-12-20
SE7800678L (en) 1978-01-19
FR2243150A1 (en) 1975-04-04
ZA744805B (en) 1975-08-27
NO138626B (en) 1978-07-03
NO743191L (en) 1975-04-01
SE426813B (en) 1983-02-14
AT375895B (en) 1984-09-25
AU7224374A (en) 1976-02-12
CA1006328A (en) 1977-03-08
IE39632L (en) 1975-03-06
JPS5072899A (en) 1975-06-16
JPS5516087B2 (en) 1980-04-28
CH608769A5 (en) 1979-01-31
SE413498B (en) 1980-06-02
IE39632B1 (en) 1978-11-22
DE2441299A1 (en) 1975-03-13
SE7411252L (en) 1975-03-07
ATA719174A (en) 1984-02-15
DE2441299C2 (en) 1984-09-27
NO138626C (en) 1978-10-11
NO780260L (en) 1975-03-07

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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