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    Method for operating a power generator
    3.
    发明授权
    Method for operating a power generator 失效
    运行发电机的方法

    公开(公告)号：US5445902A

    公开(公告)日：1995-08-29

    申请号：US133872

    申请日：1993-10-12

    申请人： Takao Soma ,  Tomonori Takahashi ,  Shinji Kawasaki ,  Katsuki Yoshioka

    发明人： Takao Soma ,  Tomonori Takahashi ,  Shinji Kawasaki ,  Katsuki Yoshioka

    IPC分类号： H01M4/86 ,  H01M8/04 ,  H01M8/12 ,  H01M8/02

    CPC分类号： H01M8/04089 ,  H01M8/04007 ,  H01M8/1231 ,  Y10T29/49108

    摘要： A method for operating a power generator in which a solid oxide fuel cell is used as a power-generating element and an air electrode of the solid oxide fuel cell is composed of lanthanum manganite, the method involving the step of setting a heating rate and a cooling rate at least in a temperature range of 800.degree. C. to 900.degree. C. at not less than 3.degree. C./min. when the fuel cell is heated up to an operating temperature at the time of starting the power generator and when the fuel cell is cooled from the operating temperature at the time of stopping the power generator. Alternatively, the method involves the step of setting a partial pressure of oxygen, at least in a temperature range of 800.degree. C. to 900.degree. C., in an atmosphere to which the air electrode is exposed, to at not less than 10.sup.-15 arms but not more than 10.sup.-1 arms when the fuel cell is heated up to an operating temperature at the time of starting the power generator and when the fuel cell is cooled from the operating temperature at the time of stopping the power generator.

    摘要翻译： 一种使用固体氧化物型燃料电池作为发电元件的发电机的动作方法以及固体氧化物型燃料电池的空气电极，由亚锰酸镧构成，其特征在于，包括：设定加热速度和 冷却速度至少在800℃至900℃的温度范围内，不低于3℃/分钟。 当燃料电池在启动发电机时被加热到工作温度，并且当燃料电池从停止发电机时的工作温度冷却时。 或者，该方法包括在空气电极暴露的气氛中至少在800℃〜900℃的温度范围内设定氧分压至不小于10度的步骤， 当燃料电池被加热到启动发电机时的工作温度，并且当燃料电池从停止发电机时的工作温度冷却时，15臂但不大于10-1臂。

    Silicon nitride sintered bodies and process for manufacturing the same
    8.
    发明授权
    Silicon nitride sintered bodies and process for manufacturing the same 失效
    氮化硅烧结体及其制造方法

    公开(公告)号：US4795724A

    公开(公告)日：1989-01-03

    申请号：US58115

    申请日：1987-06-04

    申请人： Takao Soma ,  Tomonori Takahashi

    发明人： Takao Soma ,  Tomonori Takahashi

    IPC分类号： C04B35/584 ,  C04B35/593 ,  C04B35/58

    CPC分类号： C04B35/584 ,  C04B35/5935

    摘要： Silicon nitride sintered bodies are disclosed, which each consist essentially of Si, O, N, and at least two kinds of rare earth elements selected from Y, Er, Tm, Yb, and Lu the bodies comprising not less than 70% by weight of Si.sub.3 N.sub.4. The ratio of the molar amount of all the rare earth elements contained in the sintered body calculated as moles of Ln.sub.2 O.sub.3, Ln being a rare earth element selected from Y, Er. Tm, Yb and Lu divided by the molar amount of oxygen calculated as moles of SiO.sub.2 is within the range of from 0.4 to 1.3. The amount of oxygen calculated as moles of SiO.sub.2 is obtained by subtracting the amount of oxygen contained in all the Ln.sub.2 O.sub.3, all the rare earth elements contained in said sintered body being considered as molecules of Ln.sub.2 O.sub.3 from the amount of oxygen contained in the sintered body and converting the remaining amount of oxygen into moles of SiO.sub.2. Any one of the rare earth elements contained in the sintered body accounts for not more than 95 mol % of all the rare earth elements contained in the sintered body. An intergranular phase of Si.sub.3 N.sub.4 grains contained in the sintered body is substantially of a crystalline phase and not less than 50% of the crystalline phase of the intergranular phase is a crystalline phases of an apatite structure. A process for manufacturing such silicon nitride sintered bodies is also disclosed.

    摘要翻译： 公开了氮化硅烧结体，其各自主要由Si，O，N和至少两种选自Y，Er，Tm，Yb和Lu的稀土元素组成，所述稀土元素包含不小于70重量％ Si3N4。 烧结体中所含的所有稀土元素的摩尔量的比例，以Ln2O3的摩尔数计，Ln为选自Y，Er的稀土元素。 Tm，Yb和Lu除以以SiO 2摩尔计算的氧的摩尔量在0.4至1.3的范围内。 以SiO2的摩尔数计算的氧的量通过从烧结体中所含的氧的量中减去所有Ln 2 O 3中包含的所有烧结体中包含的所有烧结体中的氧被认为是Ln 2 O 3的分子而得到的氧的量， 将剩余的氧量转化为SiO 2的摩尔数。 包含在烧结体中的稀土元素中的任一种占烧结体中所含的全部稀土元素的不超过95mol％。 包含在烧结体中的Si 3 N 4晶粒的晶间相基本上是结晶相，晶间相的结晶相的50％以上是磷灰石结构的结晶相。 还公开了制造这种氮化硅烧结体的方法。

    Production of silicon nitride sintered body
    9.
    发明授权
    Production of silicon nitride sintered body 失效
    生产氮化硅烧结体

    公开(公告)号：US4801414A

    公开(公告)日：1989-01-31

    申请号：US12160

    申请日：1987-02-09

    申请人： Takao Soma ,  Tomonori Takahashi

    发明人： Takao Soma ,  Tomonori Takahashi

    IPC分类号： C04B35/584 ,  C04B35/593 ,  C04B41/00 ,  C04B41/80 ,  C04B33/32

    CPC分类号： C04B41/009 ,  C04B35/5935 ,  C04B41/0072 ,  C04B41/80

    摘要： A process is disclosed for producing silicon nitride sintered bodies. The process comprises the steps of molding a formulated starting material of silicon nitride, firing a thus obtained molding to obtain a fired body having a desired shape, and then thermally treating the fired body in such an atmosphere that has an oxygen partial pressure higher than that in a firing atmosphere and suppresses a weight increment in oxidation to not more than 0.1 mg/cm.sup.2. Working may be done to obtain the desired shape of the fired body after the firing but before the thermal treatment.

    摘要翻译： 公开了一种用于生产氮化硅烧结体的方法。 该方法包括以下步骤：模制配制的氮化硅原料，焙烧如此获得的模制物，以获得具有所需形状的烧制体，然后在氧分压高于其中的氧气分压的气氛中对烧成体进行热处理。 在烧成气氛中，抑制氧化重量增加至0.1mg / cm 2以下。 可以进行工作以在烧制之后但是在热处理之前获得所需的烧制体的形状。

    Production of silicon nitride sintered body
    10.
    发明授权
    Production of silicon nitride sintered body 失效
    生产氮化硅烧结体

    公开(公告)号：US4747984A

    公开(公告)日：1988-05-31

    申请号：US932204

    申请日：1986-11-18

    申请人： Takao Soma ,  Tomonori Takahashi

    发明人： Takao Soma ,  Tomonori Takahashi

    IPC分类号： C04B35/584 ,  C04B35/593 ,  C04B35/64

    CPC分类号： C04B35/584 ,  C04B35/5935

    摘要： A process for manufacturing a silicon nitride sintered body comprises molding a mixed powder of a silicon nitride starting material and a sintering aid and firing a thus obtained molding. The firing is carried out in an N.sub.2 atmosphere or a mixed atmosphere of N.sub.2 and an inert gas to which CO.sub.2 or a mixed gas of CO.sub.2 and CO is added. Thereby, an O.sub.2 partial pressure is increased to restrain the evaporation of SiO.sub.2 and nitriding of SiO.sub.2 during the firing. The silicon nitride sintered body suffers almost no deterioration of the fired surface resulting from the evaporation of SiO.sub.2 and the nitriding of SiO.sub.2, and exhibits substantially equal four point bending strength and oxidation resistance with respect to the fired surface and the inside thereof.

    摘要翻译： 一种氮化硅烧结体的制造方法，其特征在于，将氮化硅原料和烧结助剂的混合粉末成形，烧成由此得到的成形体。 烧成是在N 2的气氛或N 2的混合气氛和CO 2或CO 2和CO的混合气体中添加的惰性气体中进行的。 由此，增加O2分压，以抑制SiO 2的蒸发和焙烧期间的SiO 2的氮化。 氮化硅烧结体几乎没有由于SiO 2的蒸发和SiO 2的氮化而引起的烧结表面的劣化，并且相对于烧结表面及其内部表现出大致相等的四点弯曲强度和抗氧化性。