Title:
SINGLE-PHASE HEXAGONAL-DIAMOND BULK SINTERED BODY, AND PRODUCTION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2014/027470
Kind Code:
A1
Abstract:
Provided is a method with which pure (single-phase) hexagonal diamond can be obtained in a size (in bulk) large enough to be industrially applicable. Graphite which is highly crystalline and highly oriented, i.e. having a mosaic spread of 5˚ or less, is used as a starting material, and a temperature in the range of 1000-1500˚C is imparted thereto under a pressure in the range of 20-25GPa. The size of the single-phase hexagonal-diamond bulk sintered body obtained using this method depends upon the size of the highly oriented/highly crystalline graphite starting material, but as long as the pressure and temperature can be wholly imparted (i.e. the size of a pressurized chamber of a high-pressure/high-temperature imparting device permitting), an arbitrary size can be obtained.
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Inventors:
OHFUJI HIROAKI (JP)
IRIFUNE TETSUO (JP)
IRIFUNE TETSUO (JP)
Application Number:
PCT/JP2013/052768
Publication Date:
February 20, 2014
Filing Date:
February 06, 2013
Export Citation:
Assignee:
NAT UNIV CORP EHIME UNIV (JP)
International Classes:
C04B35/52; B01J3/06; C01B31/06; C04B35/645; C30B35/00
Domestic Patent References:
| WO2012023473A1 | 2012-02-23 |
Foreign References:
| JP2003292397A | 2003-10-15 |
Attorney, Agent or Firm:
Kyoto International Patent Law Office (JP)
Patent business corporation Kyoto international patent firm (JP)
Patent business corporation Kyoto international patent firm (JP)
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