Method of synthesizing diamond

Details Method of synthesizing diamond Method of synthesizing diamond

1985-03-28

1986-12-30

Doll, John

Chemistry of inorganic compounds

Carbon or compound thereof

Elemental carbon

156DIG68, C01B 3106

Patent

active

046328173

ABSTRACT:
A diamond synthesizing method carried out under diamond-stable superhigh pressure and temperature by employing a synthesizing vessel (10) having a plurality of synthesizing chambers (10a, 10b) divided by a partition layer (16) in the vertical direction. Solvent metals (13a, 13b) respectively placed in the upwardly arranged synthesizing chamber (10a) and the downwardly arranged synthesizing chamber (10b) are prepared so that the solvent metals are different in eutectic temperature with carbon from each other. In the respective synthesizing chambers (10a, 10b), carbon sources (12a, 12b) are placed in contact with highest-temperature portions of the respective solvent metals (13a, 13b) and seed crystals (11a, 11b) are placed in contact with lowest-temperature portions thereof. The synthesizing vessel (10) is provided with a temperature gradient in such directivity that the upper part thereof is at a higher temperature and the lower part is at a lower temperature.

REFERENCES:
patent: 3297407 (1967-01-01), Wentorf, Jr.
patent: 3423717 (1969-01-01), Bovenkerk
patent: 4287168 (1981-09-01), Wentorf, Jr. et al.
patent: 4322396 (1982-03-01), Strong
Journal of Physical Chemistry, vol. 75, No. 12, 1971, pp. 1833-1837, "Some Studies of Diamond Growth Rates", R. H. Wentorf.
Japanese Patent Laying Open Gazette Nos. 88289/1977, 69211/1981.

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