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    Sinterable ceramic powder, process for its preparation, silicon nitride ceramic manufactured therefrom, process for its manufacture and its use
    3.
    发明授权
    Sinterable ceramic powder, process for its preparation, silicon nitride ceramic manufactured therefrom, process for its manufacture and its use 失效
    可烧结陶瓷粉末，其制备方法，其制造的硅酸盐陶瓷，其制造方法及其用途

    公开(公告)号：US5081078A

    公开(公告)日：1992-01-14

    申请号：US443881

    申请日：1989-11-30

    申请人： Marcellus Peuckert ,  Martin Bruck ,  Thomas Gerdau ,  Hans-Jerg Kleiner ,  Tilo Vaahs ,  Fritz Aldinger

    发明人： Marcellus Peuckert ,  Martin Bruck ,  Thomas Gerdau ,  Hans-Jerg Kleiner ,  Tilo Vaahs ,  Fritz Aldinger

    IPC分类号： C01B21/068 ,  C04B35/589 ,  C04B35/593 ,  C08G77/48 ,  C08G77/62

    CPC分类号： C04B35/589 ,  C04B35/5935

    摘要： The invention relates to a novel sinterable ceramic powder, to its preparation, to its processing to form silicon nitride ceramic and to said material itself and its use. The sinterable ceramic powder is prepared by dissolving the polysilazane of formula (I)[CH.sub.3 SiHNH].sub.n [CH.sub.3 SiN].sub.nwhere n is about 10 to 12, in an organic solvent, suspending a pulverulent sinter aid in this solution and then evaporating the solvent and pyrolyzing the residue in an inert gas atmosphere at 500.degree. to 1600.degree. C.The resulting ceramic powder can be used to form a shaped article and then to manufacture silicon nitride ceramic by sintering. It is also possible, however, to form a shaped article from the as yet unpyrolyzed residue obtained after evaporation of the solvent, and then to pyrolyze and sinter said article.The ceramic obtained can be used to manufacture components subject to high mechanical, thermal and corrosive stress.

    摘要翻译： 本发明涉及一种新型的可烧结陶瓷粉末，用于其制备，以形成氮化硅陶瓷的加工以及所述材料本身及其用途。 可烧结陶瓷粉末是通过在有机溶剂中溶解式（I）[CH3SiHNH] n [CH3SiN] n的聚硅氮烷[N，N-二甲基甲酰胺] n [CH3SiN] n，其中n为约10〜12，将粉状烧结助剂悬浮在该溶液中，然后蒸发溶剂， 在惰性气体气氛中在500〜1600℃下热解残渣。得到的陶瓷粉末可用于形成成形制品，然后通过烧结制造氮化硅陶瓷。 然而，也可以从蒸发溶剂后获得的仍然未裂解的残余物形成成型制品，然后热解并烧结所述制品。 获得的陶瓷可用于制造受到高机械，热和腐蚀应力的部件。

    Polymeric hydridochlorosilazanes, process for their preparation, ceramic materials containing silicon nitride which can be manufactured therefrom, and their manufacture
    6.
    发明授权
    Polymeric hydridochlorosilazanes, process for their preparation, ceramic materials containing silicon nitride which can be manufactured therefrom, and their manufacture 失效
    聚合氢氯硅氮烷，其制备方法，可由其制造的含氮化硅的陶瓷材料及其制造方法

    公开(公告)号：US5189132A

    公开(公告)日：1993-02-23

    申请号：US759035

    申请日：1991-09-05

    申请人： Tilo Vaahs ,  Thomas Gerdau ,  Hans-Jerg Kleiner ,  Marcellus Peuckert ,  Martin Bruck

    发明人： Tilo Vaahs ,  Thomas Gerdau ,  Hans-Jerg Kleiner ,  Marcellus Peuckert ,  Martin Bruck

    IPC分类号： C04B35/589 ,  C08G77/62

    CPC分类号： C04B35/589 ,  C08G77/62

    摘要： The invention relates to novel polymeric hydridochlorosilazanes, to their preparation, to their processing to form ceramic materials containing silicon nitride, and to said materials themselves. The polymeric hydridochlorosilazanes are prepared by reacting oligohydridoorganosilazanes of the general formula (R.sup.1 SiHNH).sub.n, in which n is about 3 to about 12, with at least one of the chlorosilanes R.sup.2 SiHCl.sub.2, R.sup.3 SiCl.sub.3, Cl.sub.2 R.sup.4 Si--CH.sub.2 CH.sub.2 --SiR.sup.4 Cl.sub.2 or Cl.sub.3 Si--CH.sub.2 CH.sub.2 --SiR.sup.5 Cl.sub.2 at 30.degree. C. to 300.degree. C., where the radicals independently of one another have the following meanings:R.sup.1 =a C.sub.1 -C.sub.6 alkyl or C.sub.2 -C.sub.6 alkenyl group,R.sup.2 =a C.sub.2 -C.sub.6 alkenyl group if R.sup.2 SiHCl.sub.2 is reacted with the oligosilazanes by itself, orR.sup.2 =a C.sub.1 -C.sub.6 alkyl or C.sub.2 -C.sub.6 alkenyl group if R.sup.2 SiHCl.sub.2 is reacted with the oligosilazanes as a mixture with other chlorosilanes, andR.sup.3, R.sup.4, R.sup.5 =a C.sub.1 -C.sub.6 alkyl or C.sub.C.sub.2 -C.sub.6 alkenyl group,and where R.sup.3 SiCl.sub.3 is used only as a mixture with at least one of the other chlorosilanes (containing R.sup.2, R.sup.4 or R.sup.5).The polymeric hydridochlorosilazanes according to the invention can be converted into polysilazanes by reaction with ammonia, and these in turn can be pyrolyzed to form ceramic materials containing silicon nitride.

    摘要翻译： 本发明涉及新型的聚合氯化二氯硅氮烷，用于其制备，以形成含有氮化硅的陶瓷材料的加工，以及所述材料本身。 通过使通式（R1SiHNH）n的低聚氢化有机硅氮烷（其中n为约3至约12）与至少一种氯代硅烷R 2 SiHCl 2，R 3 SiCl 3，Cl 2 R 4 Si-CH 2 CH 2 -SiR 4 Cl 2或Cl 3 Si-CH 2 CH 2 -SiR 5 Cl 2中的至少一种反应来制备聚合的氢氯硅氮烷， 30℃至300℃，其中彼此独立的基团具有以下含义：R 1 = C 1 -C 6烷基或C 2 -C 6烯基，如果R 2 SiHCl 2与C 2 -C 6烯基反应，则R 2 = C 2 -C 6烯基 如果R2SiHCl2与低聚硅氮烷作为与其它氯硅烷的混合物反应，则R2 = C1-C6烷基或C2-C6烯基，R3，R4，R5 = C1-C6烷基或CC2-C6烯基 ，并且其中R 3 SiCl 3仅与至少一种其它氯硅烷（包含R 2，R 4或R 5）一起使用。 根据本发明的聚合物氯化硅烷可以通过与氨的反应转化为聚硅氮烷，并且这些可以热解而形成含有氮化硅的陶瓷材料。

    Sinterable ceramic powder, process for its production, silicon nitride ceramic produced therefrom, process for its production and its use
    7.
    发明授权
    Sinterable ceramic powder, process for its production, silicon nitride ceramic produced therefrom, process for its production and its use 失效

    公开(公告)号：US5162272A

    公开(公告)日：1992-11-10

    申请号：US498266

    申请日：1990-03-23

    申请人： Marcellus Peuckert ,  Tilo Vaahs ,  Martin Bruck ,  Hans-Jerg Kleiner ,  Ralf Riedel ,  Martin Sehr ,  Gunter Petzow

    发明人： Marcellus Peuckert ,  Tilo Vaahs ,  Martin Bruck ,  Hans-Jerg Kleiner ,  Ralf Riedel ,  Martin Sehr ,  Gunter Petzow

    IPC分类号： C01B21/068 ,  C04B35/589 ,  C04B35/626

    CPC分类号： C04B35/589

    摘要： The invention relates to a novel sinterable ceramic powder, to its preparation and to its further processing to give a silicon nitride ceramic, and to this material itself and its use. The sinterable ceramic powder is produced by melting a polysilazane or dissolving it in an organic solvent, suspending a powdered sinter aid in this melt or solution, then pyrolyzing the melt, or the residue obtained after evaporation of the solvent, at 500.degree. to 1600.degree. C. in a protective gas atmosphere, the polysilazane eitherA) being obtainable by reacting at least one of the oligosilazanes of the formula (I) ##STR1## in which a, b, c and d are the mole fractions of the respective structural units and where 0.ltoreq.a.ltoreq.1, 0.ltoreq.b.ltoreq.1, 0.ltoreq.c.ltoreq.0.7, 0.ltoreq.d.ltoreq.0.7, 0.3.ltoreq.a+b, c+d.ltoreq.0.7 and n is approximately 2 to approximately 12, with at least one of the chlorosilanes R.sup.6 R.sup.7 SiCl.sub.2, R.sup.8 SiCl.sub.3, Cl.sub.2 R.sup.9 Si--CH.sub.2 CH.sub.2 --SiR.sup.9 Cl.sub.2 and Cl.sub.3 Si--CH.sub.2 CH.sub.2 SiR.sup.10 Cl.sub.2 at 30.degree. to 300.degree. C., where, independently of one another, R.sup.1, R.sup.2, R.sup.4, R.sup.6, R.sup.7 and R.sup.8 are H, C.sub.1 -C.sub.6 -alkyl or C.sub.2 -C.sub.6 -alkenyl and R.sup.3, R.sup.5, R.sup.9 and R.sup.10 are C.sub.1 -C.sub.6 -alkyl or C.sub.2 -C.sub.6 -alkenyl, orB) having the following formula ##STR2## in which R and R* can be identical or different and R and R* are C.sub.1 -C.sub.4 -alkyl, vinyl or phenyl and R' is C.sub.1 -C.sub.4 -alkyl and x and y are the mole fractions of the two structural units, where x+y=1 and x=0.7-0.95.A molded article can be formed from the ceramic powder thus obtained and a silicon nitride ceramic then produced by sintering. However, a molded article can also be formed from the solidified melt or the still unpyrolyzed residue obtained after evaporating the solvent and this article can then by pyrolyzed and sintered.Components subject to severe mechanical, thermal and corrosive stress can be produced from the ceramic obtained.