JPS56100121A - Diamond synthesizing method - Google Patents

Diamond synthesizing method

Info

Publication number
JPS56100121A
JPS56100121A JP216880A JP216880A JPS56100121A JP S56100121 A JPS56100121 A JP S56100121A JP 216880 A JP216880 A JP 216880A JP 216880 A JP216880 A JP 216880A JP S56100121 A JPS56100121 A JP S56100121A
Authority
JP
Japan
Prior art keywords
temp
diamond
stable
region
graphite
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
JP216880A
Other languages
Japanese (ja)
Inventor
Eiichi Iizuka
Akira Sanekata
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.)
Resonac Holdings Corp
Original Assignee
Showa Denko KK
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 Showa Denko KK filed Critical Showa Denko KK
Priority to JP216880A priority Critical patent/JPS56100121A/en
Publication of JPS56100121A publication Critical patent/JPS56100121A/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
    • B01J2203/0605—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)

Abstract

PURPOSE:To obtain blocky diamond in a high yield by giving a temp. gradient to a sample so that the lower temp. part becomes a region where diamond is stable and the higher temp. part becomes a region where graphite is stable when diamond is synthesized from graphite by a static pressure method. CONSTITUTION:Sample 6 consistig of graphite and catalyst is put in container 7, and graphite cylinder 8 as a heating element is placed outside container 7. Electrically conductive rings 10 and electrically conductive plates 9 for heating are placed at the top and bottom of sample 6. A temp. gradient is given to sample 6 between central part A and peripheral part B, and heating and pressurizing conditions are set so that lower temp. part A becomes a region where diamond is stable and higher temp. part B becomes a region where graphite is stable. The temp. difference between points A and B is about 100-300 deg.C. The pressure is controlled by obtaining the relation between it and additional load by a general method utilizing the transition of metal at room temp. The state is held for about 2-10min, and then container 7 is slowly cooled to shift the higher temp. side to a region where diamond is stable. The slow cooling rate is <=about 20 deg.C/min.
JP216880A 1980-01-14 1980-01-14 Diamond synthesizing method Pending JPS56100121A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP216880A JPS56100121A (en) 1980-01-14 1980-01-14 Diamond synthesizing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP216880A JPS56100121A (en) 1980-01-14 1980-01-14 Diamond synthesizing method

Publications (1)

Publication Number Publication Date
JPS56100121A true JPS56100121A (en) 1981-08-11

Family

ID=11521828

Family Applications (1)

Application Number Title Priority Date Filing Date
JP216880A Pending JPS56100121A (en) 1980-01-14 1980-01-14 Diamond synthesizing method

Country Status (1)

Country Link
JP (1) JPS56100121A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114130306A (en) * 2021-11-29 2022-03-04 福沃莱德(辽宁省)高新科技股份公司 Method for eliminating diamond burrs

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114130306A (en) * 2021-11-29 2022-03-04 福沃莱德(辽宁省)高新科技股份公司 Method for eliminating diamond burrs
CN114130306B (en) * 2021-11-29 2023-08-25 福沃莱德(辽宁省)高新科技股份公司 Method for eliminating diamond burrs

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