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    Gas sensor
    4.
    发明公开
    Gas sensor 有权
    气体传感器

    公开(公告)号：EP1037041A2

    公开(公告)日：2000-09-20

    申请号：EP00301955.1

    申请日：2000-03-09

    Applicant: NGK SPARK PLUG CO., LTD

    Inventor： Nadanami, Norihiko ,  Oshima, Takafumi ,  Fujita, Hiroki ,  Inoue, Ryuji

    IPC: G01N27/407

    CPC classification number: G01N27/4074 ,  G01N33/005

    Abstract: A gas sensor comprising a proton-conductive layer 5 formed of a polymer electrolyte; first and second electrodes 3 and 4 disposed in contact with the proton-conductive layer 5 and having a function of dissociating hydrogen; a gas-diffusion-rate limiting layer 2 disposed between a measurement gas atmosphere and the first electrode 3 and adapted to diffuse the gas under measurement to the first electrode 3 in a diffusion-rate limited state; and a dense support 1 supporting these elements. Hydrogen gas having reached the first electrode 3 via the gas-diffusion-rate limiting layer 2 is dissociated into protons by virtue of the catalytic action of Pt contained in the electrode and the voltage applied to the first electrode 3, and the generated protons are pumped to the second electrode 4 via the proton-conductive layer 5 and are converted to hydrogen gas, which diffuses into the measurement gas atmosphere. When the applied voltage is sufficiently high, saturation current flows between the first and second electrodes 3 and 4, and the magnitude of the saturation current varies in proportion to the hydrogen gas concentration of the gas under measurement.
    A hydrogen gas sensor which operates at low temperature in a hydrogen-rich atmosphere, and can accurately measure hydrogen gas concentration of a fuel gas of a fuel cell, is thereby provided.

    Abstract translation: 气体传感器，包括由聚合物电解质形成的质子传导层5; 设置成与质子传导层5接触并具有离解氢的功能的第一和第二电极3和4; 气体扩散速率限制层2，其设置在测量气体气氛与第一电极3之间，并且适于将扩散速率限制状态下的被测气体扩散到第一电极3; 和支持这些元素的密集支撑1。 通过气体扩散速率限制层2到达第一电极3的氢气借助于包含在电极中的Pt的催化作用和施加到第一电极3的电压而离解为质子，并且产生的质子被泵送 通过质子传导层5传递到第二电极4，并转化成氢气，其扩散到测量气体气氛中。 当施加的电压足够高时，饱和电流在第一和第二电极3和4之间流动，并且饱和电流的大小与被测气体的氢气浓度成比例变化。 由此，提供一种氢气传感器，该氢气传感器在富氢气氛下以低温进行动作，能够高精度地测定燃料电池的燃料气体的氢气浓度。

    LaGaO3 sintered body
    5.
    发明公开
    LaGaO3 sintered body 有权
    Sinterkörperaus LaGaO3

    公开(公告)号：EP1026133A2

    公开(公告)日：2000-08-09

    申请号：EP00102641.8

    申请日：2000-02-08

    Applicant: NGK SPARK PLUG CO., LTD

    Inventor： Fujita, Hiroki ,  Inoue, Ryuji ,  Oshima, Takafumi

    IPC: C04B35/01 ,  G01N27/407

    CPC classification number: C04B35/01 ,  G01N27/4073

    Abstract: Disclosed is an LaGaO 3 sintered body which comprises lanthanum, gallium, oxygen and at least one of other elements, and has at least three crystal phases of different composition formulae.

    Abstract translation: 公开了一种LaGaO 3烧结体，其包含镧，镓，氧和至少一种其它元素，并且具有不同组成式的至少三个结晶相。

    Gas sensor
    6.
    发明公开
    Gas sensor 有权

    公开(公告)号：EP1037041A3

    公开(公告)日：2004-12-29

    申请号：EP00301955.1

    申请日：2000-03-09

    Applicant: NGK SPARK PLUG CO., LTD

    Inventor： Nadanami, Norihiko ,  Oshima, Takafumi ,  Fujita, Hiroki ,  Inoue, Ryuji

    IPC: G01N27/407

    CPC classification number: G01N27/4074 ,  G01N33/005

    Abstract: A gas sensor comprising a proton-conductive layer 5 formed of a polymer electrolyte; first and second electrodes 3 and 4 disposed in contact with the proton-conductive layer 5 and having a function of dissociating hydrogen; a gas-diffusion-rate limiting layer 2 disposed between a measurement gas atmosphere and the first electrode 3 and adapted to diffuse the gas under measurement to the first electrode 3 in a diffusion-rate limited state; and a dense support 1 supporting these elements. Hydrogen gas having reached the first electrode 3 via the gas-diffusion-rate limiting layer 2 is dissociated into protons by virtue of the catalytic action of Pt contained in the electrode and the voltage applied to the first electrode 3, and the generated protons are pumped to the second electrode 4 via the proton-conductive layer 5 and are converted to hydrogen gas, which diffuses into the measurement gas atmosphere. When the applied voltage is sufficiently high, saturation current flows between the first and second electrodes 3 and 4, and the magnitude of the saturation current varies in proportion to the hydrogen gas concentration of the gas under measurement. A hydrogen gas sensor which operates at low temperature in a hydrogen-rich atmosphere, and can accurately measure hydrogen gas concentration of a fuel gas of a fuel cell, is thereby provided.

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