JPS6427630A - Preparation of diamond - Google Patents

Preparation of diamond

Info

Publication number
JPS6427630A
JPS6427630A JP18177787A JP18177787A JPS6427630A JP S6427630 A JPS6427630 A JP S6427630A JP 18177787 A JP18177787 A JP 18177787A JP 18177787 A JP18177787 A JP 18177787A JP S6427630 A JPS6427630 A JP S6427630A
Authority
JP
Japan
Prior art keywords
diamond
metal
nuclei
medium
alloy
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.)
Pending
Application number
JP18177787A
Other languages
Japanese (ja)
Inventor
Hiroaki Nagata
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.)
Matsumoto Yushi Seiyaku Co Ltd
Original Assignee
Matsumoto Yushi Seiyaku Co Ltd
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 Matsumoto Yushi Seiyaku Co Ltd filed Critical Matsumoto Yushi Seiyaku Co Ltd
Priority to JP18177787A priority Critical patent/JPS6427630A/en
Publication of JPS6427630A publication Critical patent/JPS6427630A/en
Pending 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
    • B01J2203/065—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

PURPOSE:To produce a large-sized and high-quality diamond in a high yield by placing beforehand a metal plate for controlling development of diamond nuclei between graphite or easily-graphitizable carbon and a medium metal alloy, thereby to convert it into diamond. CONSTITUTION:A metal plate 3 (e.g., a metal composed of a single element such as Co etc. or an alloy such as Fe-Cr etc.) for controlling development of diamond nuclei is placed beforehand between graphite or easily-graphitizable carbon 1 and a medium metal alloy 2, thereby to convert it into diamond. That is, the carbonaceous substance 1 and the medium metal 2 are superimposed on each other in an electrically- and thermally-insulating cylindrical chamber 5 made of ceramic so as to form a multilayer arrangement with the nuclei-controlling metal 3 intervening between two adjacent layers. Further, a carbonaceous electrical conductor 4, a copper plate 7, an electricity-applying ring 8 and a ceramic disc 6 are positioned in the cylindrical chamber 5. This reaction vessel thus charged is set in a high pressure-generating apparatus and reaction is allowed to take place at a pressure and temperature within a stable region, thereby converting it into large-sized and high-quality diamonds. Moreover, it is preferable that the thickness of the layer of the metal plate 3 for controlling development of nuclei be 10-30% of the thickness of the medium metal 2.
JP18177787A 1987-07-21 1987-07-21 Preparation of diamond Pending JPS6427630A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18177787A JPS6427630A (en) 1987-07-21 1987-07-21 Preparation of diamond

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18177787A JPS6427630A (en) 1987-07-21 1987-07-21 Preparation of diamond

Publications (1)

Publication Number Publication Date
JPS6427630A true JPS6427630A (en) 1989-01-30

Family

ID=16106699

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18177787A Pending JPS6427630A (en) 1987-07-21 1987-07-21 Preparation of diamond

Country Status (1)

Country Link
JP (1) JPS6427630A (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS517639A (en) * 1974-07-08 1976-01-22 Nissan Motor
JPS5523201A (en) * 1978-06-22 1980-02-19 Mitsukata Yoshimura Method and machine for bundling reinforcing iron pieces
JPS5879899A (en) * 1981-11-09 1983-05-13 Sumitomo Electric Ind Ltd Synthesis of diamond
JPS59169918A (en) * 1983-03-14 1984-09-26 Showa Denko Kk Synthesis of diamond

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS517639A (en) * 1974-07-08 1976-01-22 Nissan Motor
JPS5523201A (en) * 1978-06-22 1980-02-19 Mitsukata Yoshimura Method and machine for bundling reinforcing iron pieces
JPS5879899A (en) * 1981-11-09 1983-05-13 Sumitomo Electric Ind Ltd Synthesis of diamond
JPS59169918A (en) * 1983-03-14 1984-09-26 Showa Denko Kk Synthesis of diamond

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