Method of growing diamond from graphite

Details Method of growing diamond from graphite Method of growing diamond from graphite

1996-06-04

1997-11-25

Tung, T.

Chemistry: electrical and wave energy

Processes and products

Processes of treating materials by wave energy

2041574, 20415741, 20415715, 423446, C01B 3100, C01B 3106, B01J 306

Patent

active

056907940

ABSTRACT:
A method is proposed for growing diamond from graphite, including placing a sample of graphite in a high pressure chamber, applying a pulse-periodical laser radiation having a wavelength in the region of transmission of diamond to the sample of graphite, wherewith absorption of the pulse of laser radiation takes place in the skin-layer of graphite and the graphite is heated in the region of the skin-layer to the temperature of graphite-to-diamond phase transition. After cooling the produced layer of diamond, the steps of heating successive layers of the sample of graphite with pulses of laser radiation and cooling said layers are repeated until complete transformation of the graphite to diamond.

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patent: 5366556 (1994-11-01), Prince et al.
patent: 5462772 (1995-10-01), Lemelson
Ming et al. (Rev. Sci. Instrum., vol. 45, No. 9, Sep. 1974, 1115-1118) Sep. 974.
L.E. Shterenberg & V.N. Slesarev, "The Effect of Dopants on the Amount of Diamond Synthesized in the Presence of Catalyst Metals," in L. Vereschagin, Synthetic Diamonds and Hydrostatic Extrusion General Editorial Board for Foreign Language Publications, Moscow 1987.
F.P. Bundy, "Direct Conversion of Graphite to Diamond in Static Pressure Apparatus," pp. 631-643, Journal of Chemical Physics, vol. 38, No. 3, Feb. 1, 1963.

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