Chemistry of inorganic compounds – Carbon or compound thereof – Elemental carbon
Patent
1980-05-09
1982-03-30
Meros, Edward J.
Chemistry of inorganic compounds
Carbon or compound thereof
Elemental carbon
206525, 422129, 422240, 425 77, C01B 3106
Patent
active
043223966
ABSTRACT:
Reaction vessel construction is described for suppressing spontaneous diamond nucleation and simultaneously reducing the flaw content in the main body of diamond grown from diamond seed material by the process broadly disclosed in U.S. Pat. No. 3,297,407 to Wentorf, Jr.
In the reaction vessel construction the body of catalyst-solvent metal is formed with at least one small tip projecting from the underside thereof. A single diamond seed is placed in contact with this (or each) tip. The underside of the plug of catalyst-solvent metal is in contact with a nucleation-suppressing disc, or layer, of a material different from the catalyst-solvent and selected from a specific group of materials. In each case the tip of catalyst-solvent metal projects through a hole in the disc or layer to make contact with the diamond seed material.
REFERENCES:
patent: 3297407 (1967-01-01), Wentorf
patent: 3303053 (1967-02-01), Strong et al.
patent: 3317035 (1967-05-01), Cannon
patent: 3346102 (1967-10-01), Strong
patent: 3423177 (1969-01-01), Bovenkerk
patent: 4287168 (1981-09-01), Wentorf et al.
Armagnac "Popular Science"and vol. 197, No. 3, 1970, pp. 82, 83, 134 and 137.
General Electric Company
Meros Edward J.
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