Chemical vapor deposition of coiled ceramics

卷材陶瓷的化学气相沉积

• 批准号: 01550594
• 负责人: MOTOJIMA Seiji
• 金额: $ 1.54万
• 依托单位: Gifu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1989
• 资助国家: 日本
• 起止时间: 1989 至 1990
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-01550594/
• 关键词: CVD (Chemical vapor Deposition); Carbon fibers; Silicon carbide fibers; Coils; Ceramic Coils; Titanium carbide fibers; ファイバ-; 窒化ケイ素; 炭化ケイ素; 炭化チタン

1) Preparation conditions of the coiled carbon fibers have been examined in detail.a) It was found that a small amount of impurities such as hydrogen sulfide, phosphorus trichloride, it was indispensable for the growth of the coiled carbon fibers. The optimum concentration of the H_2S impurity was determined to be 0.06-0.09 vo1%.b) The maximum yield of the coiled carbon fibers (about 30 %) was obtained at about 700^ﾟC under an optimum impurity concentration.c) The coil length increased linearly with increasing reaction time up to 60 min.d) The flow rate of acetylene and acetone impurities did not affected on the growth of the coiled carbon fibers.2) Growth mechanism of the coiled carbon fibers was discussed. It was observed that presence of nickel catalyst was indispensable for the growth of the coiled carbon fibers. We proposed a new growth mechanism "tip quasi-VLS mechanism" for the growth of the coiled carbon fibers.3) The coiled silicon carbide fibers have been prepared by the vapour phase siliconizing of the coiled carbon fibers, and also by the reaction of an organic presusrsor with carbon tetrachloride and hydrogen at 1300-1400^ﾟC.4) The coiled titanium carbide fibers have been prepared by the vapor phase titanizing of the coiled carbon fibers at 1100-1300^ﾟC.

1)详细考察了缠绕碳纤维的制备条件。a)发现少量的硫化氢、三氯化磷等杂质，是缠绕碳纤维生长所不可缺少的。确定了H_2S杂质的最佳浓度为0.06 ~ 0.09 vo1%。b)在最佳杂质浓度下，在700^ cc左右的温度下，碳纤维的收率最高（约30%）。C)随着反应时间的增加，卷材长度呈线性增加，反应时间可达60 min。d)乙炔和丙酮杂质的流速对卷材碳纤维的生长没有影响。2)探讨了卷曲碳纤维的生长机理。结果表明，镍催化剂的存在对卷绕碳纤维的生长是必不可少的。我们提出了一种新的缠绕碳纤维生长机制“尖端准vls机制”。3)将螺旋状碳化硅纤维进行气相硅化，并与四氯化碳和氢在1300 ~ 1400‰的有机压力下反应，制备了螺旋状碳化硅纤维。4)将碳纤维在1100 ~ 1300^ / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / /

项目成果

M. Kawaguchi, K. Nozaki, S. Motojima and H. Iwanaga: "A Growth mechanism of regularly coiled carbon fibers through acetylene"

M. Kawaguchi、K. Nozaki、S. Motojima 和 H. Iwanaga：“通过乙炔实现规则盘绕碳纤维的生长机制”

S.Motojima,M.Kawaguchi,K.Nozaki and H.Iwanaga: "Growth of regularly-coiled carbon fibers by Ni catalyzed pyrolysis of acetylene,and their morphology and extension characteristics" Appl.Phys.Lett.56. 321-323 (1990)

S.Motojima、M.Kawaguchi、K.Nozaki 和 H.Iwanaga：“Ni 催化乙炔热解生长规则卷曲碳纤维及其形态和延伸特性”Appl.Phys.Lett.56。

元島 栖二,川口 雅之,岩永 浩: "新しい繊維状無桟フィラ- ーコイル状セラミックファイバ-ー" 石膏と石灰. 228. 347-353 (1990)

Seiji Motoshima、Masayuki Kawaguchi、Hiroshi Iwanaga：“新型无棒纤维填料 - 卷绕陶瓷纤维” 石膏和石灰。 228. 347-353 (1990)

H. Iwanaga, T. Iwasaki and S. Motojima: "Tensile test method for micro-coils of ceramic fibers" Hyomen Gizyutsu. 41(5). 578-579 (1990)

H. Iwanaga、T. Iwasaki 和 S. Motojima：“陶瓷纤维微线圈的拉伸试验方法”Hyomen Gizyutsu。

S.Motojima,M.Kawaguchi,K.Nozaki and H.Iwanaga: "Preparation of coiled carbon fibers by catalytic pyrolysis of acetylene,and its morphology and extension characteristics" Carbon.

S.Motojima、M.Kawaguchi、K.Nozaki 和 H.Iwanaga：“乙炔催化热解制备卷曲碳纤维及其形貌和延伸特性” 碳。