Title:
SYNTHESIS OF DIAMOND BY COMBUSTION METHOD
Document Type and Number:
Japanese Patent JPH04124093
Kind Code:
A
Abstract:
PURPOSE:To enable economical synthesis of diamond having increased crystal size by increasing the volume mixing ratio of oxygen/hydrocarbon fuel with the lapse of time after the start of synthesis. CONSTITUTION:A hydrocarbon fuel gas such as acetylene is mixed with oxygen and burnt with a burner. The flame is made to collide with a substrate surface to effect the synthesis of diamond. In the above process, the mixing volume ratio of both gases (oxygen/hydrocarbon fuel) is increased with the lapse of time after the start of the synthesis. The amount of intermediate carbon product near the surface of the substrate can be decreased at the start of synthesis to suppress the generation of graphite and carbon, and deposit diamond in high stability. A diamond having increased crystal size can be produced by this process.
Inventors:
MORINISHI YOSHIAKI
SUZUKI TOMIO
SUZUKI TOMIO
Application Number:
JP24450390A
Publication Date:
April 24, 1992
Filing Date:
September 13, 1990
Export Citation:
Assignee:
KOBE STEEL LTD
International Classes:
C30B29/04; (IPC1-7): C30B29/04
Attorney, Agent or Firm:
Akeda Kan