发明授权
- 专利标题: Vapor grown carbon fiber, production method thereof and composite material containing the carbon fiber
- 专利标题(中): 气相生长碳纤维,其生产方法和含有碳纤维的复合材料
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申请号: US11628801申请日: 2005-06-07
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公开(公告)号: US08206678B2公开(公告)日: 2012-06-26
- 发明人: Kotaro Yano , Ryuji Yamamoto , Toshio Morita
- 申请人: Kotaro Yano , Ryuji Yamamoto , Toshio Morita
- 申请人地址: JP Tokyo
- 专利权人: Showa Denko K.K.
- 当前专利权人: Showa Denko K.K.
- 当前专利权人地址: JP Tokyo
- 代理机构: Sughrue Mion, PLLC
- 优先权: JP2004-169759 20040608; JP2004-251283 20040831
- 国际申请: PCT/JP2005/010750 WO 20050607
- 国际公布: WO2005/121420 WO 20051222
- 主分类号: C01B31/00
- IPC分类号: C01B31/00 ; C01B31/02 ; C01B31/08 ; C01B31/10 ; D01F9/12 ; D01F9/127 ; B82B1/00 ; B82B3/00
摘要:
The invention relates to a vapor grown carbon fiber having a mean fiber diameter of 80 to 500 nm, an aspect ratio of 100 to 200 and preferably a bulk density of 0.02 g/cm3 or less, wherein filaments having a diameter within ±20% of the mean fiber diameter occupies 65% (on a number basis) or more of the total. The production method involves thermal decomposition of a carbon source at 800 to 1,300° C. in the presence of, as a catalyst, a transition metal compound having a vapor pressure of 0.13 kPa (1 mmHg) or more at 150° C. and spraying of the carbon source and the transition metal compound in gas form toward the reactor inner wall to allow reaction to proceed. The vapor grown carbon fiber having a larger aspect ratio has excellent dispersibility, and when added in a resin, a smaller amount contributes to enhancement in electroconductivity and thermal conductivity, as compared with a case using conventional one.