GB1069801A - Improvements in diamond growth - Google Patents

Improvements in diamond growth

Info

Publication number
GB1069801A
GB1069801A GB1338664A GB1338664A GB1069801A GB 1069801 A GB1069801 A GB 1069801A GB 1338664 A GB1338664 A GB 1338664A GB 1338664 A GB1338664 A GB 1338664A GB 1069801 A GB1069801 A GB 1069801A
Authority
GB
United Kingdom
Prior art keywords
graphite
metal
tube
catalyst
shield
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
GB1338664A
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Publication of GB1069801A publication Critical patent/GB1069801A/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
    • B01J3/065—Presses for the formation of diamonds or boronitrides
    • 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
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/004—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses involving the use of very high pressures
    • 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
    • B01J2203/065—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)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Carbon And Carbon Compounds (AREA)
  • Adornments (AREA)
  • Catalysts (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)

Abstract

Discrete single diamonds are grown from a carbonaceous material-metal catalyst combination which is surrounded by a metal shield, at a pressure of 40-57 kilobars and a temperature of 1150-1300 DEG C., such that the metal catalyst melts and the metal shield does not. The shield may be of Ta, W, Ti, Zr, Ni, or Ni alloys with Fe, Cr, or Fe-Cr, and may be a tube, sphere, cube, or rectangular parallelepiped. The catalyst may be Cr, Mn, Ta, or a Group VIII metal or their alloys. In the examples, a shield tube lined with graphite is used, containing a mixture of graphite and catalyst, or containing a diamond seed crystal wrapped in catalyst foil surrounded by graphite. The tube is placed in a reaction vessel comprising a hollow cylindrical tube of pyrophyllite, talc, catlinite, or NaCl, containing a graphite heater tube (connected to electric supply via metallic end discs), and a lining of alumina or magnesia with end plugs of the same material. The assembly parts may first be subjected to a vacuum bake (10-4-10-6 mm. Hg) at 1000 DEG C. for metal parts, 2000-3000 DEG C. for graphite, 500-1000 DEG C. for stone parts, or 450 DEG C. for NaCl; or as a unit at 1000 DEG C. The vessel and its contents may then be subjected to the required pressure, and maintained for 20-30 mins. at just below the diamond forming region, e.g. 1000-1150 DEG C.; optionally cooled, e.g. to room temperature, by cutting off the current; then heated to the diamond growing temperature.
GB1338664A 1960-09-19 1964-04-01 Improvements in diamond growth Expired GB1069801A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US5678460A 1960-09-19 1960-09-19
US26941263A 1963-04-01 1963-04-01

Publications (1)

Publication Number Publication Date
GB1069801A true GB1069801A (en) 1967-05-24

Family

ID=26735705

Family Applications (2)

Application Number Title Priority Date Filing Date
GB2931861A Expired GB1000702A (en) 1960-09-19 1961-08-14 Improvements in or relating to the manufacture of diamonds
GB1338664A Expired GB1069801A (en) 1960-09-19 1964-04-01 Improvements in diamond growth

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB2931861A Expired GB1000702A (en) 1960-09-19 1961-08-14 Improvements in or relating to the manufacture of diamonds

Country Status (5)

Country Link
CH (2) CH481842A (en)
DE (2) DE1427368B2 (en)
GB (2) GB1000702A (en)
NL (2) NL131149C (en)
SE (2) SE303739B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012136821A1 (en) * 2011-04-08 2012-10-11 Element Six Limited Containment element comprising mullite or a polymorph of mullite, assembly comprising same, method of making same and method of using same

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ZA781154B (en) * 1978-02-28 1979-09-26 De Beers Ind Diamond Abrasive bodies
US4246005A (en) * 1978-04-01 1981-01-20 Hiroshi Ishizuka Diamond aggregate abrasive materials for resin-bonded applications
CN101890321A (en) * 2010-07-29 2010-11-24 郑州人造金刚石及制品工程技术研究中心有限公司 Synthetic block for improving internal density
CN101890322A (en) * 2010-07-30 2010-11-24 郑州人造金刚石及制品工程技术研究中心有限公司 Synthetic block with uniform stress on each part
GB201205673D0 (en) * 2012-03-30 2012-05-16 Element Six Abrasives Sa Polycrystalline superhard material and method of making same
GB201210876D0 (en) * 2012-06-20 2012-08-01 Element Six Abrasives Sa Inserts and method for making same
CN109966994A (en) * 2019-04-26 2019-07-05 河南省力量钻石股份有限公司 A kind of diamond synthesizing compound block for transmitting pressure and preparation method thereof
CN111359537B (en) * 2019-08-30 2021-07-09 三河市晶日金刚石复合材料有限公司 Composite sheet synthetic block
RU2735087C1 (en) * 2020-03-12 2020-10-28 Федеральное государственное бюджетное учреждение науки Институт физики высоких давлений им. Л.Ф. Верещагина Российской академии наук (ИФВД РАН) Method of producing polycrystalline diamond material with a hole

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012136821A1 (en) * 2011-04-08 2012-10-11 Element Six Limited Containment element comprising mullite or a polymorph of mullite, assembly comprising same, method of making same and method of using same
US9249054B2 (en) 2011-04-08 2016-02-02 Element Six Limited Containment element comprising mullite or a polymorph of mullite, assembly comprising same, method of making same and method of using same

Also Published As

Publication number Publication date
SE343609B (en) 1972-03-13
GB1000702A (en) 1965-08-11
DE1427368A1 (en) 1969-04-30
DE1277829B (en) 1968-09-19
CH481842A (en) 1969-11-30
NL269351A (en)
NL131149C (en)
SE303739B (en) 1968-09-09
DE1427368B2 (en) 1970-08-13
CH461445A (en) 1968-08-31

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