BORON NITRIDE FIBER AND PROCESS FOR PRODUCING THE SAME
    1.
    发明申请
    BORON NITRIDE FIBER AND PROCESS FOR PRODUCING THE SAME 审中-公开
    BORON NITRIDE FIBER AND PROCESS FOR PRODUCTION THE SAME

    公开(公告)号:WO1995025834A1

    公开(公告)日:1995-09-28

    申请号:PCT/JP1995000500

    申请日:1995-03-20

    IPC分类号: D01F09/10

    摘要: A boron nitride fiber comprising hexagonal and/or turbostratic boron nitride and having a C plane oriented in parallel with the fiber axis and a degree of crystal orientation of 0.74 or above. It is produced by preparing a boron nitride precursor by heating an adduct formed between a boron trihalide, such as boron trichloride, and a nitrile compound, such as acetonitrile or benzonitrile, and an ammonium halide or a primary amine hydrohalide in the presence of a boron trihalide at around 125 DEG C, dissolving the obtained precursor in a solvent which can dissolve the same, spinning a boron nitride precursor fiber from the obtained solution, heat treating the spun precursor fiber in an inert gas atmosphere and then in an ammonia gas atmosphere to prepare a boron nitride fiber, and heat treating the obtained fiber while applying a tensile stress to the fiber. The obtained fiber, having a degree of crystal orientation of 0.74 or above, exhibits a high tensile strength.

    摘要翻译: 一种氮化硼纤维,其包含六方晶系和/或膨胀氮化硼,并且具有与纤维轴平行取向的C面和0.74以上的晶体取向度。 通过在硼的存在下加热形成在三氯化硼等三卤化物之类的加合物和腈化合物如乙腈或苄腈,卤化铵或伯胺氢卤酸盐之间来制备氮化硼前体, 三卤化物在125℃左右,将得到的前体溶解在可溶解的溶剂中,从得到的溶液中纺出氮化硼前体纤维,在惰性气体气氛中,然后在氨气气氛中对前述纺丝前体纤维进行热处理, 制备氮化硼纤维,并对所得纤维进行热处理,同时对纤维施加拉伸应力。 得到的结晶取向度为0.74以上的纤维表现出高的拉伸强度。