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1.发明授权
公开(公告)号：US4571331A
公开(公告)日：1986-02-18
申请号：US560389
申请日：1983-12-12
申请人： Morinobu Endou , Minoru Takamizawa , Tatsuhiko Hongu , Taishi Kobayashi , Akira Hayashida , Nobuaki Urasato , Hiromi Ohsaki , Nichiro Suzuki , Takasi Toide
发明人： Morinobu Endou , Minoru Takamizawa , Tatsuhiko Hongu , Taishi Kobayashi , Akira Hayashida , Nobuaki Urasato , Hiromi Ohsaki , Nichiro Suzuki , Takasi Toide
IPC分类号： C01B31/36 , C04B35/565 , C04B35/575
CPC分类号： B82Y30/00 , C01B31/36 , C04B35/565 , C04B35/575 , C01P2002/72 , C01P2002/82 , C01P2004/62 , C01P2004/64 , C01P2006/40
摘要： The invention provides a method for the preparation of an ultrafine powder of silicon carbide having an extremely fine and uniform particle size distribution of spherical agglomerate particles each formed of crystallites of 5 nm or smaller in size. The silicon carbide powder is prepared by the vapor phase pyrolysis of a specified methyl hydrogen(poly)silane as diluted with a carrier gas, e.g. hydrogen, to give a concentration of 40% by volume or lower at a temperature of 750.degree. to 1600.degree. C. The silicon carbide powder can readily be sintered at a temperature of 1750.degree. to 2500.degree. C. even without addition of a sintering aid to give a sintered body of extremely high density reaching 80% or larger of the theoretical value which can never be obtained of the conventional silicon carbide powders.
摘要翻译： 本发明提供一种制备碳化硅超细粉末的方法，其具有均匀的颗粒尺寸分布的球形聚集体颗粒，它们各自由5nm或更小的微晶形成。 碳化硅粉末通过气相热分解制备，所述气相热分解用载气稀释的特定甲基氢（聚）硅烷。 氢气，在750〜1600℃的温度下浓度为40体积％以下。碳化硅粉末可以容易地在1750〜2500℃的温度下烧结，即使不添加烧结助剂 得到非常高密度的烧结体达到常规碳化硅粉末不可获得的理论值的80％以上。
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公开(公告)号：US4762810A
公开(公告)日：1988-08-09
申请号：US17818
申请日：1987-02-24
申请人： Morinobu Endo , Minoru Takamizawa , Tatsuhiko Hongu , Akira Hayashida , Nobuaki Urasato , Hiromi Ohsaki
发明人： Morinobu Endo , Minoru Takamizawa , Tatsuhiko Hongu , Akira Hayashida , Nobuaki Urasato , Hiromi Ohsaki
IPC分类号： C04B35/565 , C04B35/571 , C04B35/56
CPC分类号： C04B35/571
摘要： Sintered bodies of silicon carbide having remarkably increased volume resistivity and thermal conductivity can be obtained by heating a green body shaped of a fine silicon carbide powder admixed with boron or a boron compound, e.g. boron carbide, titanium boride and boron oxide, as a sintering aid at 1800.degree. to 2200.degree. C. in the presence of or in the vicinity of a shaped body of a powdery mixture of a fine silicon carbide powder admixed with boron nitride in the same furnace. The improvements in the volume resistivity and thermal conductivity of the sintered body are particularly remarkable when the fine silicon carbide powder is a pyrolysis product of a methyl hydrogen silane compound such as tetramethyl disilane.
摘要翻译： 可以通过加热与硼或硼化合物混合的细小碳化硅粉末的生坯体，例如通过加热形成具有显着增加的体积电阻率和导热性的碳化硅的烧结体。 碳化硼，硼化钛和氧化硼作为烧结助剂，在1800-2200℃下，在与其相同的氮化硼混合的细碳化硅粉末的粉末混合物的成形体存在下或其附近 炉。 当细碳化硅粉末是甲基氢硅烷化合物如四甲基乙硅烷的热解产物时，烧结体的体积电阻率和热导率的改善是特别显着的。
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公开(公告)号：US5011639A
公开(公告)日：1991-04-30
申请号：US453038
申请日：1989-12-12
IPC分类号： C04B35/565 , C04B35/626 , H01L21/48
CPC分类号： H01L21/4807 , C04B35/565
摘要： A powdery mixture of a fine silicon carbide powder admixed with boron or a boron compound, e.g. boron carbide, titanium boride and boron oxide, as a sintering aid is compression-molded into a green body which is subjected to a sintering treatment into a sintered body. Different from conventional methods in which the sintering treatment is performed always in an atmosphere of an inert gas, e.g. argon, the sintering treatment in the inventive method is performed in an atmosphere of a rare gas containing 0.005-5% by volume of nitrogen. The sintered body of silicon carbide obtained by this method has an outstandingly high electric volume resistivity of 10.sup.10 to 10.sup.13 ohm.cm and a coefficient of thermal conductivity of 100-220 W/m.K.
摘要翻译： 与硼或硼化合物混合的细碳化硅粉末的粉末混合物，例如 作为烧结助剂的碳化硼，硼化钛和氧化硼被压缩成型坯，其经历烧结处理成烧结体。 不同于常规方法，其中始终在惰性气体气氛中进行烧结处理，例如， 氩气中，本发明方法中的烧结处理在含有0.005-5体积％氮气的稀有气体的气氛中进行。 通过该方法获得的碳化硅烧结体具有极高的体积电阻率为1010至1013欧姆·厘米，导热系数为100-220W / m·K。
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公开(公告)号：US4981666A
公开(公告)日：1991-01-01
申请号：US931667
申请日：1986-11-17
CPC分类号： C30B25/005 , C30B29/36
摘要： In place of the conventional silicon source materials used in the prior art method for the preparation of silicon carbide whiskers, the inventive method utilizes a hydrolysis product of a chlorosilane compound R.sub.a SiCl.sub.4-a or a chlorodisilane compound R.sub.b Si.sub.2 Cl.sub.6-b, in which R is a hydrogen atom or a monovalent hydrocarbon group, a is zero to 3 and b is 1 to 5, as the silicon source which is intimately mixed with a powder of carbon and the mixture is heated at 1400.degree. to 1700.degree. C. to give silicon carbide whiskers in a high conversion. Alternatively, the hydrolysis of the chloro(di)silane compound is performed in an aqueous medium in which a powder of carbon is dispersed in advance so that the hydrolysis product as formed is already a mixture with the carbon powder.
摘要翻译： 本发明方法代替用于制备碳化硅晶须的现有技术方法中使用的常规硅源材料，其利用氯硅烷化合物RaSiCl4-a或氯二硅烷化合物RbSi2Cl6-b的水解产物，其中R为氢 原子或一价烃基，a为0〜3，b为1〜5，作为与碳粉充分混合的硅源，将混合物在1400〜1700℃下加热，得到碳化硅晶须 在高转换。 或者，氯（二）硅烷化合物的水解在预先分散有碳粉末的水性介质中进行，使得形成的水解产物已经是与碳粉末的混合物。
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5.发明授权
公开(公告)号：US4604367A
公开(公告)日：1986-08-05
申请号：US682796
申请日：1984-12-18
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。
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公开(公告)号：US4550151A
公开(公告)日：1985-10-29
申请号：US678221
申请日：1984-12-05
摘要： The invention provides a novel organoborosilicon polymer comprising two types of the recurring monomeric units represented by the general formulas of, one, --SiR.sup.1.sub.2 --CH.sub.2 -- and, the other, --BR.sup.2 --NR.sup.3 --, in which R.sup.1, R.sup.2 and R.sup.3 are each a hydrogen atom or a monovalent hydrocarbon group. Such an organoborosilicon polymer is readily prepared by the thermal decomposition polymerization reaction of an organopolysilane compound and a borazine compound at 250.degree. to 500.degree. C. and useful as a precursor of an inorganic ceramic material or inorganic fibers or as a binder of ceramics.
摘要翻译： 本发明提供了一种新型的有机硼硅聚合物，其包含由以下通式表示的两种类型的重复单体单元：一个，-SiR 12 -CH 2 - 和另一个-BR 2 -NR 3 - ，其中R 1，R 2和R 3各自为 氢原子或一价烃基。 这种有机硼硅聚合物可以容易地通过有机聚硅烷化合物和环硼氮烷化合物的热分解聚合反应在250-500℃下制备，并且可用作无机陶瓷材料或无机纤维或陶瓷的粘合剂的前体。
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公开(公告)号：US4657991A
公开(公告)日：1987-04-14
申请号：US787328
申请日：1985-10-15
IPC分类号： C08L83/00 , C04B35/571 , C08G79/00 , C08L83/02 , C08L83/16 , D01F9/10 , C08F283/00
CPC分类号： C08G79/00 , C04B35/571 , C08L83/16
摘要： The precursor composition of silicon carbide fibers provided by the invention has greatly improved spinnability and can be spun at a very high spinning velocity to give a green filament which has a much larger tensile strength than those of conventional precursor materials and is capable of giving silicon carbide fibers having increased tensile strength by the infusibilization and calcination of the green filament of the composition under tension. The composition comprises from 80 to 99.9 parts by weight of a polycarbosilane polymer and from 20 to 0.01 part by weight of a silmethylene polymer having a degree of polymerization larger than the specified lower limit.
摘要翻译： 由本发明提供的碳化硅纤维的前体组合物大大提高了可纺性，并且可以以非常高的纺丝速度纺丝，得到具有比常规前体材料高的拉伸强度的绿色长丝，并且能够提供碳化硅 纤维通过在张力下的组合物的绿色细丝的不熔化和煅烧而具有增加的拉伸强度。 该组合物包含80-99.9重量份的聚碳硅烷聚合物和20至0.01重量份具有大于规定下限的聚合度的硅亚甲基聚合物。
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公开(公告)号：US4958040A
公开(公告)日：1990-09-18
申请号：US410202
申请日：1989-09-21
IPC分类号： B01J27/125 , C07B61/00 , C07F7/12
CPC分类号： C07F7/126
摘要： A process for preparing diorganohalogenosilanes wherein diorganodihalogenosilanes are reacted with at least one organosilicon compound having at least one .tbd.Si--H bond in the molecule and selected from polysilanes, polycarbosilanes and polysilphenylenes is described. This reaction proceeds in the presence of a Lewis acid.
摘要翻译： 描述了制备二有机二卤代硅烷与至少一种在分子中具有至少一个3BOND Si-H键的有机硅化合物反应并选自聚硅烷，聚碳硅烷和聚苯乙烯的二有机卤代硅烷的方法。 该反应在路易斯酸存在下进行。
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公开(公告)号：US5075474A
公开(公告)日：1991-12-24
申请号：US679199
申请日：1991-04-02
CPC分类号： C07F7/21
摘要： According to the method for preparing hexamethyl cyclotrisilazane of the present invention, hexamethyl cyclotrisilazane can be obtained by heating a linear or cyclic silazane compound represented by the following general formula:--(Me.sub.2 SiNH).sub.n --(wherein Me represents a methyl group and n is an integer of not less than 4) in the presence of at least one catalytic compound selected from the group consisting of ammonium salts of arylsulfonic acids and/or aminoarylsulfonic acids and the resulting hexamethyl cyclotrisilazane represented by the formula: --Me.sub.2 SiNH).sub.3 -- can be recovered by distilling off the same outside the reaction system. According to the method of the present invention, highly pure hexamethyl cyclotrisilazane can be industrially prepared in good efficiency and in a high yield. In particular, if octamethyl cyclotetrasilazane which can be industrially prepared from cheap dimethyldichlorosilane is used as a starting material, hexamethyl cyclotrisilazane can also be prepared at a low cost. Thus, the method of the present invention has enough practical value in the organic silicon industries.
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公开(公告)号：US5750637A
公开(公告)日：1998-05-12
申请号：US658166
申请日：1996-06-04
CPC分类号： C08G73/00 , C08G18/025
摘要： This invention provides a process for the preparation of a polycarbodiimide solution wherein the polycarbodiimide is synthesized by heating an organic diisocyanate (e.g., 2,4-tolylene diisocyanate or 2,6-tolylene diisocyanate) in the presence of a carbodiimidation catlayst characterized in that a non-chlorinated aromatic hydrocarbon is used as the solvent and the resulting polycarbodiimide has a number average molecular weight from about 3,000 to about 10,000; wherein the synthesis is performed in the temperature range of from about 100.degree. to about 120.degree. C.
摘要翻译： 本发明提供一种制备聚碳二亚胺溶液的方法，其中聚碳二亚胺通过在碳二亚胺二酰亚胺存在下加热有机二异氰酸酯（例如，2,4-甲苯二异氰酸酯或2,6-甲苯二异氰酸酯）来合成，其特征在于， 使用非氯化芳烃作为溶剂，所得聚碳二亚胺的数均分子量为约3,000至约10,000; 其中合成在约100℃至约120℃的温度范围内进行。
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