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31 条记录 (耗时 0.027 秒)

    Preparation of hollow ceramic fibers
    22.
    发明授权
    Preparation of hollow ceramic fibers 失效
    中空陶瓷纤维的制备

    公开(公告)号：US4948763A

    公开(公告)日：1990-08-14

    申请号：US404584

    申请日：1989-09-08

    申请人： Akira Hayashida ,  Minoru Takamizawa ,  Yoshihumi Takeda

    发明人： Akira Hayashida ,  Minoru Takamizawa ,  Yoshihumi Takeda

    IPC分类号： C04B20/00 ,  C04B35/571 ,  C04B35/589 ,  C08G77/62 ,  C08L83/16

    CPC分类号： C04B20/0056 ,  C04B35/571 ,  C04B35/589 ,  C08G77/62 ,  C08L83/16

    摘要： Hollow ceramic fibers are prepared by melt spinning an organic silazane polymer, infusibilizing the fiber to form an infusible layer on the surface, and pyrolyzing the fiber to obtain a ceramic fiber having an empty interior. The infusibilizing step includes two steps of treating the fiber with a gas containing the vapor of an infusibilizing silicon, boron, phosphorus or metal compound and further treating with a water vapor-containing gas or ammonia-containing gas. The surface infusible fibers are efficiently sintered into hollow ceramic fibers without fusion bond.

    摘要翻译： 中空陶瓷纤维通过熔融纺丝有机硅氮烷聚合物制备，使纤维不熔化以在表面上形成不熔层，并热解纤维以获得具有空的内部的陶瓷纤维。 渗透步骤包括两个步骤：用含有不熔硅，硼，磷或金属化合物的蒸汽的气体处理纤维，并进一步用含水气体气体或含氨气体进行处理。 将表面不熔纤维有效地烧结成中空陶瓷纤维而没有熔接。

    Process for manufacturing organic silazane polymers and ceramics therefrom
    23.
    发明授权
    Process for manufacturing organic silazane polymers and ceramics therefrom 失效
    从其制造有机硅氮烷聚合物和陶瓷的方法

    公开(公告)号：US4847345A

    公开(公告)日：1989-07-11

    申请号：US159315

    申请日：1988-02-23

    申请人： Minoru Takamizawa ,  Yoshihumi Takeda ,  Akira Hayashida ,  Tsutomu Takeno

    发明人： Minoru Takamizawa ,  Yoshihumi Takeda ,  Akira Hayashida ,  Tsutomu Takeno

    IPC分类号： C01B21/068 ,  C01B31/36 ,  C04B35/571 ,  C04B35/589 ,  C08G77/48 ,  C08G77/60 ,  C08G77/62 ,  D01F9/10

    CPC分类号： C08G77/60 ,  C04B35/571 ,  C04B35/589 ,  C08G77/62

    摘要： A process for manufacturing an organic silazane polymer which comprises reacting an organic silicon compound of the following formula (I): ##STR1## in which R represents hydrogen, chlorine, bromine, methyl radical, ethyl radical, phenyl radical or vinyl radical, R.sub.1 represents hydrogen or methyl radical and X represents chlorine or bromine, or a mixture of organic silicon compounds of the formula (I) above and an organic silicon compound of the following formula (II): ##STR2## in which R.sub.2 and R.sub.3 represent hydrogen, chlorine, bromine, methyl radical, ethyl radical, phenyl radical or vinyl radical and X represents chlorine or bromine with a disilazane of the following formula (III): ##STR3## in which R.sub.4, R.sub.5, R.sub.6 represents hydrogen, methyl radical, ethyl radical, phenyl radical or vinyl radical in an anhydrous state at a temperature of from 25.degree. to 350.degree. C. while distilling off by-produced organic ingredients out of the system to obtain an organic silazane polymer. The organic silazane polymer is useful for preceramic materials.

    摘要翻译： 一种制备有机硅氮烷聚合物的方法，其包括使下式（I）的有机硅化合物：其中R表示氢，氯，溴，甲基，乙基，苯基或乙烯基 ，R 1表示氢或甲基，X表示氯或溴，或上述式（I）的有机硅化合物与下式（II）的有机硅化合物的混合物：其中R 2 并且R 3代表氢，氯，溴，甲基，乙基，苯基或乙烯基，X代表氯或溴与下列通式（III）的二硅氮烷：其中R4，R5，R6 在25至350℃的温度下，以无水状态代表氢，甲基，乙基，苯基或乙烯基，同时将副产物的有机成分蒸馏出体系，得到有机硅氮烷聚合物。 有机硅氮烷聚合物可用于陶瓷材料。

    Method for the preparation of an inorganic fiber containing silicon, carbon, boron and nitrogen
    27.
    发明授权
    Method for the preparation of an inorganic fiber containing silicon, carbon, boron and nitrogen 失效
    制备含有硅，碳，硼和氮的无机纤维的方法

    公开(公告)号：US4604367A

    公开(公告)日：1986-08-05

    申请号：US682796

    申请日：1984-12-18

    申请人： Minoru Takamizawa ,  Taishi Kobayashi ,  Akira Hayashida ,  Yoshihumi Takeda

    发明人： Minoru Takamizawa ,  Taishi Kobayashi ,  Akira Hayashida ,  Yoshihumi Takeda

    IPC分类号： D01F9/10 ,  C04B35/571 ,  C08G79/00 ,  C08G79/08 ,  D01F9/08 ,  C04B35/02

    CPC分类号： D01F9/08 ,  C04B35/571 ,  C08G79/08

    摘要： The invention provides a novel inorganic fiber composed of the elements of silicon, carbon, boron and nitrogen of which the Si/B molar ratio is 2:1 to 200:1. The inorganic fiber is obtained by a method comprising the steps of: (a) preparing an organoborosilicon polymer by heating a mixture of an organopolysilane and an organoborazine compound, e.g. B-trimethyl-N-triphenyl borazine, to effect thermal decomposition and polycondensation reaction; (b) spinning the polymer into a fibrous form; (c) infusibilizing the fiber of the polymer by thermally oxidizing in an oxidizing atmosphere or by irradiating with ionizing radiations; and (d) calcining the infusibilized fiber at 900.degree. to 1800.degree. C. The inventive inorganic fiber is more stable at high temperatures than conventional silicon carbide fibers.

    摘要翻译： 本发明提供一种由硅，碳，硼和氮元素组成的新型无机纤维，Si / B摩尔比为2：1至200：1。 无机纤维通过包括以下步骤的方法获得：（a）通过加热有机聚硅烷和有机硼嗪化合物的混合物制备有机硼硅聚合物，例如 B-三甲基-N-三苯基环硼氮烷进行热分解和缩聚反应; （b）将聚合物纺丝成纤维状; （c）通过在氧化气氛中热氧化或通过照射电离辐射来使聚合物的纤维熔融化; 和（d）在900〜1800℃煅烧不熔化纤维。本发明的无机纤维在高温下比常规碳化硅纤维更稳定。

    Process for manufacturing organic silazane polymers and ceramics therefrom
    28.
    发明授权
    Process for manufacturing organic silazane polymers and ceramics therefrom 失效
    从其制造有机硅氮烷聚合物和陶瓷的方法

    公开(公告)号：US4869854A

    公开(公告)日：1989-09-26

    申请号：US114111

    申请日：1987-10-27

    申请人： Yoshihumi Takeda ,  Minoru Takamizawa ,  Akira Hayashida

    发明人： Yoshihumi Takeda ,  Minoru Takamizawa ,  Akira Hayashida

    IPC分类号： C03B8/02 ,  C04B35/571 ,  C04B35/589 ,  C08G77/62 ,  C08L83/16

    CPC分类号： C08L83/16 ,  C04B35/571 ,  C04B35/589 ,  C08G77/62

    摘要： A process for manufacturing an organic silazane polymer which comprises reacting ammonia with a mixture of at least one compound selected from the group consisting of organic silicon compounds of the following formulae (I) and (II) ##STR1## and at least one compound selected from the group consisting of organic silicon compounds of the following formula (III) ##STR2## in which R represents hydrogen, chlorine, bromine, methyl radical, ethyl radical, phenyl radical or vinyl radical, R.sub.1 represents hydrogen or methyl radical, R.sub.2 represents hydrogen, methyl radical, ethyl radical, phenyl radical or vinyl radical and X represents chlorine or bromine; to obtain an ammonolysis product. The ammonolysis product is polymerized in the presence of a basic catalyst capable of deprotonation to obtain an organic silazane polymer. The silazane polymer may be further melted, shaped and infusibilized. The thus infusibilized product is finally sintered to obtain a ceramic material.

    摘要翻译： 一种制备有机硅氮烷聚合物的方法，其包括使氨与至少一种选自下式（I）和（II）的有机硅化合物的化合物的混合物反应：（IMA） II）和选自下式（III）的有机硅化合物（III）中的至少一种化合物，其中R表示氢，氯，溴，甲基，乙基，苯基或乙烯基 R1表示氢或甲基，R2表示氢，甲基，乙基，苯基或乙烯基，X表示氯或溴; 以获得氨解产物。 氨解产物在能够去质子化的碱性催化剂存在下聚合，得到有机硅氮烷聚合物。 硅氮烷聚合物可以进一步熔融，成型和不熔化。 将这样的不熔化产物最终烧结得到陶瓷材料。