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1. 发明授权

US5238742A Polymer derived ceramic fibers having improved thermal stability 失效
标题翻译：具有改善的热稳定性的聚合物衍生的陶瓷纤维
公开(公告)号：US5238742A
公开(公告)日：1993-08-24
申请号：US808301
申请日：1991-12-16
申请人： Harvey A. Freeman , Neal R. Langley , Chi-Tang Li , Jonathan Lipowitz , James A. Rabe
发明人： Harvey A. Freeman , Neal R. Langley , Chi-Tang Li , Jonathan Lipowitz , James A. Rabe
IPC分类号： C04B35/571 , C04B35/589
CPC分类号： C04B35/571 , C04B35/589 , Y10S264/19 , Y10T428/2913 , Y10T428/2918
摘要： The present invention relates to ceramic fibers of the Si-C-N-O series with a diameter less than about 20 micrometers. It has been unexpectedly found that the thermal stability of these fibers can be increased by minimizing the impurity content, primarily the content of metals or metallic compounds. Such fibers with low levels of contaminants retain greater than about 60 percent of their initial tensile strength when subjected to temperatures of 1300.degree.-1400.degree. C. for at least 30 minutes in a non-oxidative environment.
摘要翻译：本发明涉及直径小于约20微米的Si-C-N-O系列的陶瓷纤维。意外地发现，通过最小化杂质含量，主要是金属或金属化合物的含量，可以提高这些纤维的热稳定性。当在非氧化环境中经受1300-140℃的温度至少30分钟时，具有低水平污染物的这种纤维保持其初始拉伸强度的大约60％。

2. 发明授权

US5051215A Curing preceramic polymers by exposure to nitrogen dioxide 失效
标题翻译：通过暴露于二氧化氮固化预陶瓷聚合物
公开(公告)号：US5051215A
公开(公告)日：1991-09-24
申请号：US496850
申请日：1990-03-21
申请人： James A. Rabe , Jonathan Lipowitz , Paul P. Lu
发明人： James A. Rabe , Jonathan Lipowitz , Paul P. Lu
IPC分类号： C04B35/571 , C04B35/589 , C08F8/06 , C08G77/00 , C08G77/22 , D01F9/10
CPC分类号： C04B35/571 , C04B35/589
摘要： A rapid method of infusibilizing (curing) preceramic polymers comprising treatment said polymers with gaseous nitrogen dioxide. The infusibilized polymers may be pyrolyzed to temperatures in excess of about 800.degree. C. to yield ceramic materials with low oxygen content and, thus, good thermal stability. The methods are especially useful for the production of ceramic fibers and, more specifically, to the on-line production of ceramic fibers.

3. 发明授权

US5135809A Method for densification of amorphous ceramic material 失效
标题翻译：非晶陶瓷材料致密化方法
公开(公告)号：US5135809A
公开(公告)日：1992-08-04
申请号：US577165
申请日：1989-09-27
申请人： James A. Rabe , Jonathan Lipowitz , Richard E. Jones
发明人： James A. Rabe , Jonathan Lipowitz , Richard E. Jones
IPC分类号： C04B35/571 , C04B35/575 , C04B35/589 , C04B35/593
CPC分类号： C04B35/5755 , C04B35/571 , C04B35/589 , C04B35/5935 , Y10S428/902 , Y10T428/2913 , Y10T428/2918 , Y10T428/2927 , Y10T428/2975
摘要： The elastic modulus and density of an amorphous, ceramic article derived from a resinous organosilicon polymer and having a composition consisting essentially of silicon, nitrogen and/or carbon are increased while substantially maintaining or improving tensile strength by heat treating the ceramic article at an elevated temperature under superatmospheric nitrogen pressure to increase its density while avoiding crystallization. During heat treatment, at least some of the conditions of time, temperature, heating rate, cooling rate, pressure and atmosphere are controlled to minimize erosion of the article which could otherwise occur due to the loss to the surrounding atmosphere, as a gas or gaseous component, of at least one of nitrogen, silicon and carbon. The heat treated, ceramic article is amorphous and non-crystalline and has a density substantially greater than 2.5 g/cc together with desirable values of tensile strength and elastic modulus.
摘要翻译：衍生自树脂状有机硅聚合物并且具有基本上由硅，氮和/或碳组成的组成的无定形陶瓷制品的弹性模量和密度增加，同时通过在高温下热处理陶瓷制品而基本上保持或改善拉伸强度在超大气压氮气压力下增加其密度，同时避免结晶。在热处理期间，控制时间，温度，加热速率，冷却速度，压力和气氛的至少一些条件，以最小化由于对周围大气的损失而产生的制品的侵蚀，作为气体或气体组分，氮，硅和碳中的至少一种。热处理的陶瓷制品是无定形和非结晶的，并且具有基本上大于2.5g / cc的密度以及所需的拉伸强度和弹性模量值。

4. 发明授权

US5279780A Preparation of polycrystalline ceramic fibers 失效
标题翻译：多晶陶瓷纤维的制备
公开(公告)号：US5279780A
公开(公告)日：1994-01-18
申请号：US918736
申请日：1992-07-22
申请人： Jonathan Lipowitz , James A. Rabe
发明人： Jonathan Lipowitz , James A. Rabe
IPC分类号： C01B31/36 , C04B35/565 , C04B35/571 , C04B35/622 , C04B35/80 , D01F9/10 , C04B40/00
CPC分类号： C04B35/571 , C04B35/62272
摘要： This invention relates to the preparation of polycrystalline silicon carbide fibers from ceramic fibers. The process involves heating the ceramic fiber in an environment containing a volatile sintering aid to a temperature sufficient to convert the ceramic fiber to the polycrystalline silicon carbide fiber.
摘要翻译：本发明涉及从陶瓷纤维制备多晶碳化硅纤维。该方法包括在包含挥发性烧结助剂的环境中将陶瓷纤维加热到足以将陶瓷纤维转化为多晶碳化硅纤维的温度。

5. 发明授权

US4921657A Method for densification of amorphous ceramic material 失效
公开(公告)号：US4921657A
公开(公告)日：1990-05-01
申请号：US120108
申请日：1987-11-13
申请人： James A. Rabe , Jonathan Lipowitz , Richard E. Jones
发明人： James A. Rabe , Jonathan Lipowitz , Richard E. Jones
IPC分类号： C01B21/068 , C01B21/082 , C04B35/56 , C04B35/571 , C04B35/575 , C04B35/589 , C04B35/593 , D01F9/10
CPC分类号： D01F9/10 , C04B35/571 , C04B35/5755 , C04B35/589 , C04B35/5935
摘要： The elastic modulus and density of an amorphous, ceramic article derived from a resinous organosilicon polymer and having a composition consisting essentially of silicon, nitrogen and/or carbon are increased while substantially maintaining or improving tensile strength by heat treating the ceramic article at an elevated temperature under superatmospheric nitrogen pressure to increase its density while avoiding crystallization. During heat treatment, at least some of the conditions of time, temperature, heating rate, cooling rate, pressure and atmosphere are controlled to minimize erosion of the article which could otherwise occur due to the loss to the surrounding atmosphere, as a gas or gaseous component, of at least one of nitrogen, silicon and carbon. The heat treated, ceramic article is amorphous and non-crystalline and has a density substantially greater than 2.5 g/cc together with desirable values of tensile strength and elastic modulus.

6. 发明授权

US5366943A Polycrystalline silicon carbide fibers 失效
标题翻译：多晶碳化硅纤维
公开(公告)号：US5366943A
公开(公告)日：1994-11-22
申请号：US118855
申请日：1993-09-10
申请人： Jonathan Lipowitz , James A. Rabe
发明人： Jonathan Lipowitz , James A. Rabe
IPC分类号： C01B31/36 , C04B35/565 , C04B35/571 , C04B35/622 , C04B35/80 , D01F9/10 , C04B35/56
CPC分类号： C04B35/571 , C04B35/62272
摘要： This invention relates to the preparation of polycrystalline silicon carbide fibers from ceramic fiber. The process involves heating the ceramic fiber in an environment containing a volatile sintering aid to a temperature sufficient to convert the ceramic fiber to the polycrystalline silicon carbide fiber.
摘要翻译：本发明涉及从陶瓷纤维制备多晶碳化硅纤维。该方法包括在包含挥发性烧结助剂的环境中将陶瓷纤维加热到足以将陶瓷纤维转化为多晶碳化硅纤维的温度。

7. 发明授权

US5268336A Preparation of substantially polycrystalline silicon carbide fibers from methylpolydisilylazanes 失效
标题翻译：从甲基聚二甲基硅氮烷制备基本上多晶的碳化硅纤维
公开(公告)号：US5268336A
公开(公告)日：1993-12-07
申请号：US539265
申请日：1990-06-18
申请人： David C. Deleeuw , Jonathan Lipowitz , James A. Rabe
发明人： David C. Deleeuw , Jonathan Lipowitz , James A. Rabe
IPC分类号： D01F9/10 , C04B35/571 , C04B35/52
CPC分类号： C04B35/571 , C04B35/62281 , C04B2235/3895 , C04B2235/486 , C04B2235/5264 , C04B2235/77 , C04B2235/785
摘要： A process for the preparation of substantially polycrystalline silicon carbide fibers is provided. The fibers may be fabricated to have a small diameter and are thermally stable at high temperatures. The process is carried out by initially forming fibers from a preceramic polymeric precursor comprising methylpolydisilylazane resins. The fibers are then infusibilized to render them nonmelting followed by a pyrolysis step in which the fibers are heated to a temperature in excess of 1600.degree. C. in a nonoxidizing atmosphere to form substantially polycrystalline silicon carbide fibers. The substantially polycrystalline silicon carbide fibers which are formed by the process of the present invention have at least 75% crystallinity and have a density of at least about 2.9 gm/cc.The polymeric precursor or the fibers contain, or have incorporated therein, at least about 0.2% by weight boron. This incorporation of boron may be accomplished either prior to or during formation of the fibers or during at least one of the infusibilizing or pyrolyzing steps of the process.
摘要翻译：提供了制备基本上多晶碳化硅纤维的方法。纤维可以制造成具有小直径并且在高温下是热稳定的。该方法通过首先由包含甲基聚二甲基硅氮烷树脂的预陶瓷聚合物前体形成纤维来进行。然后将纤维熔融以使其不熔化，随后进行热解步骤，其中将纤维在非氧化气氛中加热至超过1600℃的温度以形成基本上多晶的碳化硅纤维。通过本发明的方法形成的基本上多晶的碳化硅纤维具有至少75％的结晶度，并具有至少约2.9gm / cc的密度。聚合物前体或纤维含有至少约0.2重量％的硼或其中并入其中。这种硼的掺入可以在纤维形成之前或期间或在该方法的至少一个不熔化或热解步骤期间完成。

8. 发明授权

US5167881A Preparation of substantially polycrystalline silicon carbide fibers from polyorganosiloxanes 失效
标题翻译：从聚有机硅氧烷制备基本上多晶碳化硅纤维
公开(公告)号：US5167881A
公开(公告)日：1992-12-01
申请号：US649315
申请日：1991-01-31
申请人： William H. Atwell , Duane R. Bujalski , Eric J. Joffre , Gary E. LeGrow , Jonathan Lipowitz , James A. Rabe
发明人： William H. Atwell , Duane R. Bujalski , Eric J. Joffre , Gary E. LeGrow , Jonathan Lipowitz , James A. Rabe
IPC分类号： C04B35/571
CPC分类号： C04B35/571
摘要： A process for the preparation of substantially polycrystalline silicon carbide fibers are provided. The fibers may be fabricated to have a small diameter and are thermally stable at high temperature. The process is carried out by initially forming fibers from a preceramic polymeric precursor comprising phenyl-containing polyorganosiloxane resins. The fibers are then infusibilized to render them nonmelting followed by a pyrolysis step in which the fibers are heated to a temperature in excess of 1600.degree. C. in a nonoxidizing atmosphere to form substantially polycrystalline silicon carbide fibers. The substantially polycrystalline silicon carbide fibers which are formed have at least 75% crystallinity and have a density of at least about 2.9 gm/cm.sup.3. The polymeric precursor or the fibers contain, or have incorporated therein, at least about 0.2 % by weight boron. This incorporation of boron may be accomplished either prior to or during formation of the fibers or during at least one of the infusibilizing or pyrolyzing steps of the process.
摘要翻译：提供了制备基本上多晶碳化硅纤维的方法。纤维可以制造成具有小直径并且在高温下是热稳定的。该方法通过初始形成来自包含含苯基的聚有机硅氧烷树脂的陶瓷前体聚合物前体的纤维进行。然后将纤维熔融以使其不熔化，随后进行热解步骤，其中将纤维在非氧化气氛中加热至超过1600℃的温度以形成基本上多晶的碳化硅纤维。形成的基本上多晶的碳化硅纤维具有至少75％的结晶度并且具有至少约2.9gm / cm 3的密度。聚合物前体或纤维含有至少约0.2重量％的硼或其中并入其中。这种硼的掺入可以在纤维形成之前或期间或在该方法的至少一个不熔化或热解步骤期间完成。

9. 发明授权

US4572918A Foamable polyorganosiloxane compositions 失效
标题翻译：可发泡聚有机硅氧烷组合物
公开(公告)号：US4572918A
公开(公告)日：1986-02-25
申请号：US766621
申请日：1985-08-19
申请人： Chi-Long Lee , James A. Rabe
发明人： Chi-Long Lee , James A. Rabe
IPC分类号： C08J9/00 , C08J9/12 , C08J9/14 , C08J9/08 , C08J9/10
CPC分类号： C08J9/0061 , C08J9/122 , C08J9/14 , C08J2207/04 , C08J2383/04 , C08J2483/00
摘要： Polyorganosiloxane foams exhibiting a desirable combination of low density, an average cell size below 4 mm. and an average cell concentration greater than 4 per linear centimeter are obtained by dispensing oxygen curable mercaptoorganosiloxane compositions containing a cobaltocene catalyst, a dispersed liquid or gaseous blowing agent and, as a foam stabilizer, a resinous organosiloxane copolymer comprising trimethylsiloxy units, SiO.sub.4/2 units and specified fluorine-containing organosiloxane units. The polymer portion of the composition includes at least one polyorganosiloxane containing at least 20 mole percent of dimethylsiloxane units and an average of more than 2 mercaptoalkyl or mercaptoalkylene groups per molecule.
摘要翻译：表现出低密度，平均泡孔尺寸低于4mm的期望组合的聚有机硅氧烷泡沫。并且通过分配含有可待因催化剂，分散液体或气体发泡剂的氧可固化巯基有机硅氧烷组合物和作为泡沫稳定剂的包含三甲基甲硅烷氧基单元的SiO 4/2单元的树脂有机硅氧烷共聚物，获得大于4每线性厘米的平均电池浓度并指定含氟有机硅氧烷单元。组合物的聚合物部分包含至少一种含有至少20摩尔百分数的二甲基硅氧烷单元的聚有机硅氧烷，每个分子平均含有多于2个巯基烷基或巯基亚烷基。

10. 发明授权

US4584324A Silicone foam, water-based, aerosol composition 失效
标题翻译：硅胶泡沫，水性，气溶胶组成
公开(公告)号：US4584324A
公开(公告)日：1986-04-22
申请号：US782650
申请日：1985-09-30
申请人： Therese M. Bauman , Chi-Long Lee , James A. Rabe
发明人： Therese M. Bauman , Chi-Long Lee , James A. Rabe
IPC分类号： C08J9/00 , C08J9/30 , H01B1/22 , C08J9/28
CPC分类号： C08J9/30 , C08J9/0085 , H01B1/22 , C08J2207/04 , C08J2383/04
摘要： A composition useful in producing an open-cell, elastomeric silicone foam combines a silicone oil-in-water emulsion, which forms an elastomer upon removal of the water, with an aerosol propellant. When the composition is discharged to atmospheric pressure, a froth is formed. Removing water from the froth yields an open-cell foam. The froth is stabilized by surfactants, thickeners, or froth stabilizers selected from fibers or lauryl alcohol.
摘要翻译：用于生产开孔弹性体硅酮泡沫的组合物结合了一种硅胶水包油乳液，其在去除水时与气溶胶推进剂形成弹性体。当组合物排出到大气压时，形成泡沫。从泡沫中去除水会产生开孔泡沫。泡沫由选自纤维或月桂醇的表面活性剂，增稠剂或泡沫稳定剂稳定。

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