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    Method of manufacturing sintered body of silicon carbide
    32.
    发明公开
    Method of manufacturing sintered body of silicon carbide 失效
    Verfahren zur Herstellung eines gesintertenKörpersaus Siliciumcarbid。

    公开(公告)号：EP0405544A2

    公开(公告)日：1991-01-02

    申请号：EP90112345.5

    申请日：1990-06-28

    申请人： NIPPON CARBON CO., LTD.

    发明人： Ichikawa, Hiroshi, C/o Nippon Carbon CO. Ltd ,  Imai, Yoshikazu, C/o Nippon Carbon CO. Ltd

    IPC分类号： D01F9/10 ,  C04B35/56 ,  C04B35/80 ,  D01F9/08

    CPC分类号： C04B41/009 ,  C04B35/571 ,  C04B35/62227 ,  C04B41/4584 ,  D01F9/10 ,  C04B41/5001 ,  C04B14/4693

    摘要： An organosilicon high molecular compound having a skeleton of silicon and carbon or a compound obtained by polymerization of an organometallic compound and the organosilicon high molecular compound is melted into a fiber, then the fiber is antimelt-treated in an oxidizing atmosphere, and the antimelt-treated yarns are thereafter heated in an atmosphere of inert gas to obtain a fiber of silicon carbide containing 2 to 20 % by volume of oxygen. This fiber is further sintered in an atmosphere of inert gas at a temperature of 1400 to 2100 deg. C and a pressure of 300 to 3000 kg/cm². A sintered body of silicon carbide having an excellent bending strength is obtained without the use of a sintering agent or a binder.
    A fiber of silicon carbide having a predetermined oxygen content and a thin amorphous carbon layer thereon is obtained from the starting fiber by antimelt-treating and then heating in an atmosphere of a mixture of an inert gas and a hydrocarbon gas. Silicon carbide powder is mixed with the fiber thus obtained and the mixture is then heated in an atmosphere of inert gas under pressure. The sintered body thus obtained has a high strength and a remarkably small decrease in strength at high temperature.

    摘要翻译： 将具有硅和碳骨架的有机硅高分子化合物或通过有机金属化合物和有机硅高分子化合物的聚合获得的化合物熔融成纤维，然后将纤维在氧化气氛中进行电镀处理， 然后在惰性气体气氛中加热处理后的纱线，得到含有2〜20体积％氧气的碳化硅纤维。 该纤维在1400〜2100℃的惰性气体气氛中进一步烧结。 C，压力为300〜3000kg / cm 2。 在不使用烧结剂或粘合剂的情况下，获得具有优异弯曲强度的碳化硅烧结体。 从起始纤维通过反电镀处理，然后在惰性气体和烃气体的混合气氛中加热获得具有预定氧含量的碳化硅纤维和薄无定形碳层。 将碳化硅粉末与如此获得的纤维混合，然后在惰性气体气氛中加压混合物。 这样得到的烧结体的强度高，在高温下的强度明显降低。

    METHOD OF MELTING AND REFINING METALS, AND AN APPARATUS FOR COOLING ELECTRODES USED THEREFOR.
    33.
    发明公开
    METHOD OF MELTING AND REFINING METALS, AND AN APPARATUS FOR COOLING ELECTRODES USED THEREFOR. 失效
    熔化和金属用于冷却铅精炼和设备。

    公开(公告)号：EP0309583A4

    公开(公告)日：1989-07-26

    申请号：EP87904111

    申请日：1987-06-24

    申请人： NIPPON CARBON CO LTD

    发明人： NAKAMOTO YAKKA ,  MORI TOSHIHIKO

    IPC分类号： C21C20060101 ,  C21C5/52 ,  F27D11/08 ,  H05B20060101 ,  H05B7/12

    CPC分类号： H05B7/12

    摘要： Referring to Figs. 2, 3 and 4, reference numeral (10) refers to a graphite electrode among three graphite electrodes that correspond to a three-phase AC power source. A graphite electrode is connected to each of the graphite electrodes (10) via a nipple. An electric current is supplied to these electrodes in an arc furnace of melt and refine metals. The invention deals with a method of refining and melting metals and a cooling apparatus used therefor, wherein, during the refining, a cooling liquid (11) which substantially consists of water is continuously sprayed onto the outer periphery (10a) of at least one graphite electrode (10) among the three graphite electrodes or, more particularly, onto the outer periphery (10a) of the graphite electrode (10) between an electrode holder and a furnace cover. In this case, the cooling liquid (11) is sprayed not in parallel with a horizontal level L-L, but upward or downward at an angle of 10° to 35° with respect to the level L-L to cool the electrode.