- 专利标题： METHOD FOR PRODUCING BORON NITRIDE POLYCRYSTAL, BORON NITRIDE POLYCRYSTAL, CUTTING TOOL, WEAR-RESISTANT TOOL, AND GRINDING TOOL
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申请号： EP17844650.6申请日： 2017-08-25
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公开(公告)号： EP3333141A1公开(公告)日： 2018-06-13
- 发明人: ISHIDA, Yuh , SUMIYA, Hitoshi
- 申请人： Sumitomo Electric Industries, Ltd.
- 申请人地址： 5-33 Kitahama 4-chome Chuo-ku Osaka-shi, Osaka 541-0041 JP
- 专利权人： Sumitomo Electric Industries, Ltd.
- 当前专利权人： Sumitomo Electric Industries, Ltd.
- 当前专利权人地址： 5-33 Kitahama 4-chome Chuo-ku Osaka-shi, Osaka 541-0041 JP
- 代理机构： Boult Wade Tennant
- 优先权： JP2016198135 20161006
- 国际公布： WO2018066261 20180412
- 主分类号： C04B35/5831
- IPC分类号： C04B35/5831 ; B23B27/14 ; B23B27/20 ; B24D3/00 ; C01B21/064
摘要：
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.
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