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    Solid electrolyte, manufacturing method thereof, and gas sensor
    2.
    发明授权
    Solid electrolyte, manufacturing method thereof, and gas sensor 有权

    公开(公告)号：US11592418B2

    公开(公告)日：2023-02-28

    申请号：US16864462

    申请日：2020-05-01

    Applicant: DENSO CORPORATION

    Inventor： Mitsuhiro Yoshida ,  Satoshi Suzuki ,  Makoto Noguchi

    IPC: G01N27/407 ,  C04B35/488 ,  G01N27/409

    Abstract: A solid electrolyte includes partially stabilized zirconia in which a stabilizer forms a solid solution in zirconia. The partially stabilized zirconia includes at least monoclinic phase particles and cubic phase particles as crystal particles that configure the partially stabilized zirconia, and an abundance ratio of the monoclinic phase particle is 5 to 25% by volume. The partially stabilized zirconia includes stabilizer low-concentration phase particles of which concentration of the stabilizer at a particle center is equal to or less than 1 mol %, as the crystal particles. The stabilizer low-concentration phase particles have a particle-size distribution of number frequency thereof having a peak at which an average particle size is 0.6 to 1.0 μm, and a particle size at 10% of a cumulative number is 0.5 μm or greater, and of the overall low-concentration phase particles, 50% by volume or greater belong to the peak.

    Solid electrolyte, manufacturing method thereof, and gas sensor
    3.
    发明授权
    Solid electrolyte, manufacturing method thereof, and gas sensor 有权

    公开(公告)号：US11656196B2

    公开(公告)日：2023-05-23

    申请号：US16864256

    申请日：2020-05-01

    Applicant: DENSO CORPORATION

    Inventor： Satoshi Suzuki ,  Mitsuhiro Yoshida ,  Makoto Noguchi

    IPC: H01M8/02 ,  G01N27/407 ,  C04B35/486 ,  C04B35/626 ,  C04B35/64 ,  H01B1/08

    CPC classification number: G01N27/4073 ,  C04B35/486 ,  C04B35/62695 ,  C04B35/64 ,  H01B1/08 ,  C04B2235/3246 ,  C04B2235/786

    Abstract: A solid electrolyte includes partially stabilized zirconia in which a stabilizer forms a solid solution in zirconia. The partially stabilized zirconia includes, as crystal particles that configure the partially stabilized zirconia, stabilizer low-concentration phase particles of which concentration of the stabilizer at a particle center is less than 4.7 mol % and stabilizer high-concentration phase particles of which the concentration of the stabilizer at the particle center is equal to or greater than 4.7 mol %. The partially stabilized zirconia includes an adjacent particle portion in which two or more particles of the stabilizer low-concentration phase particles of which an average particle size is greater than 0.1 μm are adjacent. An abundance ratio of the stabilizer high-concentration phase particles on a cross-section of the solid electrolyte is equal to or greater than 70% in terms of area ratio relative to all crystal particles.

    Sensor element
    4.
    发明授权
    Sensor element 有权

    公开(公告)号：US10591431B2

    公开(公告)日：2020-03-17

    申请号：US16062897

    申请日：2016-12-16

    Applicant: DENSO CORPORATION

    Inventor： Makoto Noguchi ,  Satoshi Suzuki

    IPC: G01N27/12 ,  G01M15/10 ,  F01N11/00

    Abstract: An electrode for a sensor element 1 that detects a specific substance in a gas to be measured, wherein the electrode is embedded in an insulating substrate having a detection face to which the specific substance adheres, the electrode being embedded in such a manner that a part of the electrode is exposed at the detection face, the electrode comprises an alloy of Pt and at least one metal selected from the group consisting of Rh, Ru, Ir, Os, and Pd, and granular voids dispersed among the alloy, and the content of the metal in the alloy is 40 mass % or less, and the number of the granular voids per unit volume of the electrode for a sensor element is 3/100 μm3 to 50/100 μm3.

    Solid electrolyte body and gas sensor
    5.
    发明授权
    Solid electrolyte body and gas sensor 有权

    公开(公告)号：US10228342B2

    公开(公告)日：2019-03-12

    申请号：US14964632

    申请日：2015-12-10

    Applicant: DENSO CORPORATION

    Inventor： Kiyomi Kobayashi ,  Kazuki Yagi ,  Makoto Noguchi

    IPC: G01N27/407

    Abstract: A gas sensor has a gas sensor element which has a solid electrolyte body, a reference electrode and a measuring electrode. The solid electrolyte body contains partially stabilized zirconia as a main component in which zirconia is stabilized by stabilizer agent. Particle boundary parts are formed between crystal particles made of the partially stabilized zirconia. The particle boundary parts are made of a metal element such as yttria derived from the stabilizer agent, an alumina component and a silica component. A total content of the alumina component and the silica component in the particle boundary parts in the solid electrolyte body is within a range of 0.01 mass % to 1 mass % in terms of oxide in the solid electrolyte body. A ratio of the alumina component to the silica component in the particle boundary parts 12 is within a range of 0.2 to 2.0 in terms of oxide.

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