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公开(公告)号:US06774074B2
公开(公告)日:2004-08-10
申请号:US10220269
申请日:2002-09-06
申请人: Loïc Rousseau , Jean-Christophe Pasquet , Samuel Bernard , Marie-Paule Berthet , Jean Bouix , David Cornu , Philippe Mielé , Bérangère Toury , Pascaline Toutois , Christiane Vincent
发明人: Loïc Rousseau , Jean-Christophe Pasquet , Samuel Bernard , Marie-Paule Berthet , Jean Bouix , David Cornu , Philippe Mielé , Bérangère Toury , Pascaline Toutois , Christiane Vincent
IPC分类号: C04B35583
CPC分类号: D01F9/08 , Y10T428/2913
摘要: The invention concerns a method for making boron nitride fibers by drawing a polymer precursor and treating with ceramics the polymer fibers obtained by drawing. The invention is characterized in that the precursor polymer is obtained by thermal polymerization of a borazine of formula (I) wherein: R1, R3, R4 and R5, identical or different, represent an alkyl, cycloalkyl or aryl group; and R2 represents a hydrogen atom or an alkyl, cycloalkyl or aryl group.
摘要翻译: 本发明涉及通过拉伸聚合物前体并用陶瓷处理通过拉伸获得的聚合物纤维来制备氮化硼纤维的方法。 本发明的特征在于前体聚合物通过式(I)的环硼嗪的热聚合获得,其中:R 1,R 3,R 4和R 5相同或不同,表示 烷基,环烷基或芳基; R 2表示氢原子或烷基,环烷基或芳基。
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公开(公告)号:US06299805B1
公开(公告)日:2001-10-09
申请号:US09341449
申请日:1999-07-09
申请人: Karl-Hermann Friese , Helmut Weyl , Anton Hans
发明人: Karl-Hermann Friese , Helmut Weyl , Anton Hans
IPC分类号: C04B35583
CPC分类号: C04B35/583 , F01N13/008 , G01N27/4071 , G01N27/4078 , Y10S277/935 , Y10S277/936 , Y10S277/939 , Y10S277/94
摘要: A sealing member is produced from form-pressed boron nitride powder, while adding an inorganic or organic binding agent. Such boron nitride powder is obtained during the machining of boron nitride blocks composed of hexagonal boron nitride. This powder can be fractionated according to particle size and the particle size desired for manufacturing the sealing member can be separated out.
摘要翻译: 密封构件由成形氮化硼粉末制成,同时加入无机或有机结合剂。 这样的氮化硼粉末是在由六方氮化硼组成的氮化硼块的加工过程中获得的。 该粉末可以根据粒径分级,并且可以分离出用于制造密封构件所需的粒度。
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