Process for synthesizing diamond using combustion method

摘要

PCT No. PCT/JP92/01655 Sec. 371 Date May 9, 1994 Sec. 102(e) Date May 9, 1994 PCT Filed Dec. 18, 1992 PCT Pub. No. WO93/12273 PCT Pub. Date Jun. 24, 1993A modified process for synthesizing diamond having developed by further improving a process of diamond synthesis based on combustion method, which provides diamond grains 1.5 mm or larger in crystal diameter at good economy. The process comprises burying one or two or more seed crystal diamond grain(s) 2 into the surface of a substrate 1, and striking a combustion flame on said seed crystal diamond grain(s) 2 while cooling the substrate 1 to thereby allow diamond to grow on the seed crystal diamond 2 into a larger diamond grain.