Title:
窒化ホウ素多結晶体の製造方法
Document Type and Number:
Japanese Patent JP6489281
Kind Code:
B2
Abstract:
A method of producing a boron nitride polycrystal includes: a first step of obtaining a thermally treated powder by thermally treating a powder of a high pressure phase boron nitride at more than or equal to 1300°C; and a second step of obtaining a boron nitride polycrystal by sintering the thermally treated powder under a condition of 8 to 20 GPa and 1200 to 2300°C.
Inventors:
Ishida
Hitoshi Kakutani
Hitoshi Kakutani
Application Number:
JP2018506632A
Publication Date:
March 27, 2019
Filing Date:
August 25, 2017
Export Citation:
Assignee:
Sumitomo Electric Industries, Ltd.
International Classes:
C04B35/5831; B21D37/01; B23B27/14; B23B27/20; B23B51/00; B23C5/16; B23D77/00; B23F21/00; B23G5/06; B24D3/00; C04B35/645
Domestic Patent References:
| JP60184648A | ||||
| JP2030673A | ||||
| JP2015205789A | ||||
| JP1183468A | ||||
| JP2014034487A |
Foreign References:
| WO2016129328A1 |
Attorney, Agent or Firm:
Fukami patent office