PURPOSE: To selectively obtain single crystal diamond of high quality having an objective particle size by providing a mixture consisting of one of a graphite powder and a solvent metal powder, a diamond seed crystal and a volatile org. solvent between a graphite plate and a solvent metal plate in a laminar state.
CONSTITUTION: A mixture 2 of at least one of a solvent metal powder and a graphite powder and a diamond seed crystal is arranged between a solvent metal plate l and a graphite plate 3. This mixture 2 is prepared by adding a volatile org. solvent to the solvent metal powder and/or the graphite powder to uniformly mix all of them and the obtained pasty mixture is thinly applied to the solvent metal plate 1 or the graphite plate 2 and, subsequently, the org. solvent used in mixing is dried and evaporated in vacuum or an inert atmosphere at predetermined temp. As the solvent metal plate or powder, a metal of the Group VIII of the Periodic Table such as Fe, Co or Ni can be designated. As the org. solvent for obtaining the paste, for example, ethanol, glycerine or ethylene glycol can be designated.
SAWAI SUMIKAZU
SUMIYA HITOSHI
TSUJI KAZUO
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