BE759626A - Diamond synthesis from graphite and a cata- - lytic metal - Google Patents

Diamond synthesis from graphite and a cata- - lytic metal

Info

Publication number
BE759626A
BE759626A BE759626DA BE759626A BE 759626 A BE759626 A BE 759626A BE 759626D A BE759626D A BE 759626DA BE 759626 A BE759626 A BE 759626A
Authority
BE
Belgium
Prior art keywords
graphite
metal
cata
diamonds
diamond synthesis
Prior art date
Application number
Other languages
French (fr)
Inventor
A I Prikhna
A A Shulzhenko
M Y Katsai
Original Assignee
Uk Ni Kt I Sint Sverkhtverdykh
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.)
Publication date
Publication of BE759626A publication Critical patent/BE759626A/en

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
    • B01J3/062—Processes using ultra-high pressure, e.g. for the formation of diamonds; Apparatus therefor, e.g. moulds or dies characterised by the composition of the materials to be processed
    • 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
    • B01J2203/0605—Composition of the material to be processed
    • B01J2203/061—Graphite
    • 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
    • B01J2203/0655—Diamond
    • 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
    • B01J2203/0675—Structural or physico-chemical features of the materials processed
    • B01J2203/068—Crystal growth

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Carbon And Carbon Compounds (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)

Abstract

Diamonds are synthesised by subjecting a reaction mixture of graphite and a catalytic metal or alloy contg. inclusions of graphite crystals, to a temp. of at least 1150 degrees C, and a pressure of at least 40 kilobars. Pref. the catalyst is prepd. by cooling a molten bath of the metal or alloy, which is satd. with carbon. The initial rate of cooling of the bath is at least 50 degrees C/min. A considerable number of diamond monocrystals with well defined faces are obtained during a relatively short time. The diamonds have a high abrasive power.
BE759626D 1970-11-30 Diamond synthesis from graphite and a cata- - lytic metal BE759626A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE759626 1970-11-30

Publications (1)

Publication Number Publication Date
BE759626A true BE759626A (en) 1971-06-01

Family

ID=3857345

Family Applications (1)

Application Number Title Priority Date Filing Date
BE759626D BE759626A (en) 1970-11-30 Diamond synthesis from graphite and a cata- - lytic metal

Country Status (1)

Country Link
BE (1) BE759626A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001024920A1 (en) * 1999-10-05 2001-04-12 De Beers Industrial Diamonds (Pty) Ltd Growth of diamond clusters

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001024920A1 (en) * 1999-10-05 2001-04-12 De Beers Industrial Diamonds (Pty) Ltd Growth of diamond clusters
US6676750B1 (en) 1999-10-05 2004-01-13 Geoffrey John Davies Growth of diamond clusters

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Legal Events

Date Code Title Description
RE Patent lapsed

Owner name: UKRAINSKY ORDENA TRUDOVOGO RASNOGO ZNAMENI NAUCHN

Effective date: 19881130