Invention Grant
- Patent Title: Cubic boron nitride, method for producing cubic boron nitride, grinding wheel with cubic boron nitride, and sintered cubic boron nitride compact
- Patent Title (中): 立方氮化硼，立方氮化硼的制造方法，立方氮化硼的砂轮和立方氮化硼烧结体
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Application No.: US10568438Application Date: 2004-08-19
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Publication No.: US07703710B2Publication Date: 2010-04-27
- Inventor: Eiji Ihara , Taishu Yanagisawa
- Applicant: Eiji Ihara , Taishu Yanagisawa
- Applicant Address: JP Tokyo
- Assignee: Showa Denko K.K.
- Current Assignee: Showa Denko K.K.
- Current Assignee Address: JP Tokyo
- Agency: Sughrue Mion, PLLC
- Priority: JP2003-296488 20030820
- International Application: PCT/JP2004/012222 WO 20040819
- International Announcement: WO2005/019371 WO 20050303
- Main IPC: C01B21/064
- IPC: C01B21/064 ; C04B35/5831
Abstract:
A method for producing cubic boron nitride in which hBN is held in the presence of a catalyst substance under conditions in which cBN remains thermodynamically stable, to thereby cause hBN to undergo a phase transition to form cBN, wherein the catalyst substance contains a lithium source, a magnesium source, and a carbon source. The performance of cBN is improved even though phase transition ratio from hBN to cBN is increased.
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