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GB1386241A - Diamond synthesis - Google Patents

Diamond synthesis

Info

Publication number
GB1386241A
GB1386241A GB2957771A GB2957771A GB1386241A GB 1386241 A GB1386241 A GB 1386241A GB 2957771 A GB2957771 A GB 2957771A GB 2957771 A GB2957771 A GB 2957771A GB 1386241 A GB1386241 A GB 1386241A
Authority
GB
United Kingdom
Prior art keywords
zone
diamond
length
temperature
june
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
GB2957771A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB2957771A priority Critical patent/GB1386241A/en
Priority to ZA722597A priority patent/ZA722597B/en
Publication of GB1386241A publication Critical patent/GB1386241A/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
    • B01J2203/065—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)
  • Crystals, And After-Treatments Of Crystals (AREA)

Abstract

1386241 Diamond-making apparatus STANDARD TELEPHONES & CABLES Ltd 15 June 1972 [24 June 1971] 29577/71 Heading B1X [Also in Division Cl] Diamond is synthesised by subjecting a body of carbonaceous material and a catalyst to pressure and temperature conditions such that diamond produced is stable with respect to graphite, and a zone of molten catalyst is caused to move through the body, its position being controlled by a local temperature gradient superposed on the body and moved along the length thereof. The zone melting is achieved with the conventional multiple anvil high pressure apparatus by a helically wound electric heater element having a plurality of tapped connections along its length, each connected to a different anvil and controlling the current to each section between adjacent tapped connexions so as to cause a substantially level temperature profile and a local rise in temperature to melt the zone, the local rise and the molten zone being caused to pass along the length of the body.
GB2957771A 1971-06-24 1971-06-24 Diamond synthesis Expired GB1386241A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB2957771A GB1386241A (en) 1971-06-24 1971-06-24 Diamond synthesis
ZA722597A ZA722597B (en) 1971-06-24 1972-04-18 Diamond synthesis

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2957771A GB1386241A (en) 1971-06-24 1971-06-24 Diamond synthesis

Publications (1)

Publication Number Publication Date
GB1386241A true GB1386241A (en) 1975-03-05

Family

ID=10293726

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2957771A Expired GB1386241A (en) 1971-06-24 1971-06-24 Diamond synthesis

Country Status (2)

Country Link
GB (1) GB1386241A (en)
ZA (1) ZA722597B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0032545A1 (en) * 1979-12-20 1981-07-29 F. D. International Ltd. Process and device for transforming material using high pressures and temperatures
EP0430397A1 (en) * 1989-11-21 1991-06-05 Mitsubishi Materials Corporation Artificial diamond forming method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0032545A1 (en) * 1979-12-20 1981-07-29 F. D. International Ltd. Process and device for transforming material using high pressures and temperatures
EP0430397A1 (en) * 1989-11-21 1991-06-05 Mitsubishi Materials Corporation Artificial diamond forming method

Also Published As

Publication number Publication date
ZA722597B (en) 1973-01-31

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Legal Events

Date Code Title Description
PS Patent sealed
435 Patent endorsed 'licences of right' on the date specified (sect. 35/1949)
PCNP Patent ceased through non-payment of renewal fee