GB1226231A - - Google Patents

Info

Publication number
GB1226231A
GB1226231A GB1226231DA GB1226231A GB 1226231 A GB1226231 A GB 1226231A GB 1226231D A GB1226231D A GB 1226231DA GB 1226231 A GB1226231 A GB 1226231A
Authority
GB
United Kingdom
Prior art keywords
substrate
diamond
carbon
halogenated
cclf
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 GB1226231A publication Critical patent/GB1226231A/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
    • B01J3/062—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
    • B01J2203/0605—Composition of the material to be processed
    • B01J2203/0625—Carbon
    • 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)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Carbon And Carbon Compounds (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)

Abstract

1,226,231. Synthetic diamonds. BATTELLE MEMORIAL INSTITUTE. 7 Feb., 1969 [8 Feb., 1968], No. 6877/69. - Heading C1A. ' Synthetic diamonds are prepared by passing an alternating or chopped electric current between two facing electrodes in a bath of liquid containing free solvated electrons, e.g. alkali or alkaline-earth metal solutions in liquid ammonia, and at least one halogenated hydrocarbon derivative, e.g. CF 4 , CClF 3 , CCl 2 F 2 , CCl 3 F, CClF 2» CClF 2 and C 2 H 2 ClF 3 , one of the said electrodes being at least partly covered by a growth substrate i.e. a substrate having a structure enabling epitaxial growth of the diamond, the effective voltage of the said alternating current or the effective maximum voltage of the said chopped current being at least equal to the discharge value of the couple formed by the ions of the most electronegative halogen and by the most electropositive cations present, the substrate being placed at the positive electrode when a chopped current is used. The said substrate may be either a halogenated carbon compound having a carbon skeleton enabling epitaxial growth of the diamond, e.g. a compound forming a halogenated linear carbon chain such as polytetrafluoroethylene or a compound forming halogenated two-dimensional carbon lattices such as carbon monofluoride, or a crystallized substance having a crystalline network isomorphic or identical to that of the diamond, e.g. a polycrystalline mass of diamond powder, germanium,silicon, silicon carbide or a metal.
GB1226231D 1968-02-08 1969-02-07 Expired GB1226231A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH188068A CH487799A (en) 1968-02-08 1968-02-08 Synthetic diamond manufacturing process

Publications (1)

Publication Number Publication Date
GB1226231A true GB1226231A (en) 1971-03-24

Family

ID=4220735

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1226231D Expired GB1226231A (en) 1968-02-08 1969-02-07

Country Status (4)

Country Link
CH (1) CH487799A (en)
DE (1) DE1906719A1 (en)
FR (1) FR2001514A1 (en)
GB (1) GB1226231A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1983000038A1 (en) * 1981-06-22 1983-01-06 French, Frederic, A. Production of ultra-hard particles

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2244254C2 (en) * 1972-09-08 1982-09-23 De Beers Industrial Diamond Division (Proprietary) Ltd., Johannesburg, Transvaal Process for making synthetic diamonds
RU2766962C1 (en) * 2021-06-09 2022-03-16 Федеральное государственное бюджетное учреждение науки Институт геологии и минералогии им. В.С. Соболева Сибирского отделения Российской академии наук (Институт геологии и минералогии СО РАН, ИГМ СО РАН) Method for producing diamond crystals from molten alkali-earth carbonate

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1983000038A1 (en) * 1981-06-22 1983-01-06 French, Frederic, A. Production of ultra-hard particles

Also Published As

Publication number Publication date
DE1906719A1 (en) 1969-09-04
CH487799A (en) 1970-03-31
FR2001514A1 (en) 1969-09-26

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees