GB1333297A - Method and apparatus for making crystalline materials in parti cular diamonds - Google Patents

Method and apparatus for making crystalline materials in parti cular diamonds

Info

Publication number
GB1333297A
GB1333297A GB224271A GB224271A GB1333297A GB 1333297 A GB1333297 A GB 1333297A GB 224271 A GB224271 A GB 224271A GB 224271 A GB224271 A GB 224271A GB 1333297 A GB1333297 A GB 1333297A
Authority
GB
United Kingdom
Prior art keywords
horn
graphite
diamonds
large end
hammer
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
GB224271A
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.)
National Aeronautics and Space Administration NASA
Original Assignee
National Aeronautics and Space Administration NASA
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 National Aeronautics and Space Administration NASA filed Critical National Aeronautics and Space Administration NASA
Publication of GB1333297A publication Critical patent/GB1333297A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
    • B30B1/42—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by magnetic means, e.g. electromagnetic
    • 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
    • B01J3/08—Application of shock waves for chemical reactions or for modifying the crystal structure of substances
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S425/00—Plastic article or earthenware shaping or treating: apparatus
    • Y10S425/026—High pressure

Landscapes

  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Carbon And Carbon Compounds (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)

Abstract

1333297 Diamonds NATIONAL AERONAUTICS & SPACE ADMINISTRATION 18 Jan 1971 [16 Jan 1970] 2242/71 Heading C1A [Also in Division B1] Diamonds are formed by confining graphite in a pocket 28 of an anvil 30, and then directing a pressure front into -the graphite by positioning an exponentially tapering horn 23 so that the small end of the horn is in contact with the graphite and electrically generating a shock wave of sufficient intensity, e.g. by magnetic hammer 10 in the large end of the horn, which shock wave is velocity amplified and concentrated so that substantially all the energy of the wave arrives almost simultaneously at the small end of the horn in contact with the graphite, and this energy is transferred to the graphite, and compresses and heats it to a level sufficient to form diamond. Preferably an initial less intense shock may be generated at the large end of the horn so as to settle and pack the graphite in the pocket. The individual integers of the apparatus are supported as a unit by a lower plate 34, upper plate 36 and threaded rods 40, 42. Plate 36 is perforated at 38 .to permit the passage of the electrical transmission lines -to the magnetic hammer. The shape of the exponential horn is determined by the equation y=Ce<SP>ax</SP> which is rotated about the x-axis of its representative curve to generate the horn. A copper plate 18 is positioned adjacent the large end of the horn, being preferably separated from the magnetic hammer 10 by a sheet 20 of insulating material. The hammer is connected to a voltage source 14 and a capacitor bank 12 by transmission lines 16.
GB224271A 1970-01-16 1971-01-18 Method and apparatus for making crystalline materials in parti cular diamonds Expired GB1333297A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US341870A 1970-01-16 1970-01-16

Publications (1)

Publication Number Publication Date
GB1333297A true GB1333297A (en) 1973-10-10

Family

ID=21705779

Family Applications (1)

Application Number Title Priority Date Filing Date
GB224271A Expired GB1333297A (en) 1970-01-16 1971-01-18 Method and apparatus for making crystalline materials in parti cular diamonds

Country Status (6)

Country Link
US (1) US3632242A (en)
JP (1) JPS5442958B1 (en)
CA (1) CA954018A (en)
DE (1) DE2101283C3 (en)
FR (1) FR2076129B1 (en)
GB (1) GB1333297A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4385880A (en) * 1957-06-27 1983-05-31 Lemelson Jerome H Shock wave processing apparatus
SE430479B (en) * 1980-11-10 1983-11-21 Cerac Inst Sa FORM FOR COMPACTING POWDER WITHOUT A BOTTLE
US4602422A (en) * 1984-06-18 1986-07-29 Khanh Dinh Flash compression process for making photovoltaic cells

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3107395A (en) * 1959-11-27 1963-10-22 Gen Electric High pressure high temperature apparatus
BE628067A (en) * 1961-01-13
US3184353A (en) * 1961-11-13 1965-05-18 Cavitron Ultrasonics Inc Fastening together of members by high frequency vibrations
US3423794A (en) * 1964-06-30 1969-01-28 Wayne D Wilson Ultrasonic method for producing phase transitions in materials at high pressures

Also Published As

Publication number Publication date
US3632242A (en) 1972-01-04
DE2101283C3 (en) 1981-07-09
FR2076129B1 (en) 1973-08-10
FR2076129A1 (en) 1971-10-15
DE2101283B2 (en) 1980-11-27
DE2101283A1 (en) 1971-07-22
JPS5442958B1 (en) 1979-12-17
CA954018A (en) 1974-09-03

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee