PRODUCTION OF ARTIFICIAL DIAMOND POWDER - Mitsubishi Materials Corporation

Title:

PRODUCTION OF ARTIFICIAL DIAMOND POWDER

Document Type and Number:

Japanese Patent JP3099539

Kind Code:

B2

Abstract:

PURPOSE: To reduce the cost of production by irradiating a falling flow of glassy carbon powder having a specified particle diameter range with laser beams.
CONSTITUTION: Glassy carbon powder having 0.1-100μm particle diameter range is allowed to fall naturally from a storage tank into an atmosphere in which an inert gas such as He flows at a prescribed flow rate. Laser beams emitted from a laser oscillator such as CO2 laser are converged on the resulting falling flow to form a laser beam converged region, the convergence temp. is regulated at ≥2,000°C and the falling flow is continuously irradiated with the laser beams Artifical diamond powder is obtd. at a low cost.

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Inventors:

Yoshihiro Kitagawa
Yuzo Ohsawa
Norifumi Kikuchi

Application Number:

JP21628992A

Publication Date:

October 16, 2000

Filing Date:

July 22, 1992

Export Citation:

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Assignee:

Mitsubishi Materials Corporation

International Classes:

B01J19/12; C01B31/06; C30B1/00; C30B29/04; (IPC1-7): C30B29/04; C01B31/06

Domestic Patent References:

JP5246704A
JP388707A
JP255212A
JP483525A

Attorney, Agent or Firm:

Kazuo Tomita (1 person outside)

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