公开(公告)号：US11643365B2

公开(公告)日：2023-05-09

申请号：US16864268

申请日：2020-05-01

Applicant: DENSO CORPORATION

Inventor： Mitsuhiro Yoshida ,  Satoshi Suzuki ,  Makoto Noguchi

IPC: H01M4/02 ,  C04B35/486 ,  C04B35/626 ,  C04B35/64 ,  G01N27/407

CPC classification number: C04B35/486 ,  C04B35/62645 ,  C04B35/62695 ,  C04B35/64 ,  G01N27/4073 ,  C04B2235/3246 ,  C04B2235/785 ,  C04B2235/786

Abstract: The invention relates to a solid electrolyte including partially stabilized zirconia, a producing method thereof, and a gas sensor including a solid electrolyte. The partially stabilized zirconia includes crystal particles, the crystal particles include mixed phase particles each having a high-concentration phase and a low-concentration phase, the high-concentration phase being defined such that a concentration of the stabilizer is 4.7 mol % or more, the low-concentration phase being defined as a concentration of the stabilizer is less than 4.7 mol %.

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.

公开(公告)号：US12111282B2

公开(公告)日：2024-10-08

申请号：US17448733

申请日：2021-09-24

Applicant: DENSO CORPORATION

Inventor： Mitsuhiro Yoshida ,  Satoshi Suzuki

IPC: G01N27/407 ,  C04B35/486 ,  G01M15/10 ,  G01N27/409

CPC classification number: G01N27/4073 ,  C04B35/486 ,  C04B2235/3225 ,  C04B2235/3246 ,  C04B2235/9607 ,  G01M15/102 ,  G01N27/4071 ,  G01N27/409

Abstract: A solid electrolyte includes stabilized or partially stabilized zirconia, and a gas sensor provided with the solid electrolyte. A change rate of a crystallite diameter for at least one of a cubic phase and a tetragonal phase in crystal particles constituting the solid electrolyte configured by a fired body after performing an annealing treatment, before and after heating the solid electrolyte from room temperature to 1200° C., is 10% or less. The solid electrolyte preferably includes partially stabilized zirconia.

公开(公告)号：US11927561B2

公开(公告)日：2024-03-12

申请号：US16864281

申请日：2020-05-01

Applicant: DENSO CORPORATION

Inventor： Makoto Noguchi ,  Satoshi Suzuki ,  Mitsuhiro Yoshida

IPC: G01N27/407 ,  C04B35/486

CPC classification number: G01N27/4073 ,  C04B35/486 ,  C04B2235/3246 ,  C04B2235/5436 ,  C04B2235/5445 ,  C04B2235/5454 ,  C04B2235/781 ,  C04B2235/785 ,  C04B2235/786

Abstract: The invention relates to a solid electrolyte comprised of partially stabilized zirconia, and a gas sensor including the solid electrolyte. The partially stabilized zirconia includes crystal particles, the crystal particles include at least stabilizer low-concentration phase particles, and the partially stabilized zirconia further includes voids. Among the stabilizer low-concentration phase particles, the presence rate of the stabilizer low-concentration phase particles where each distance from a void is 5 μm or less is 65 volume percent or more. The stabilizer low-concentration phase particles include specific stabilizer low-concentration phase particles each having a distance of 5 μm or less from an adjacent void in the voids, a presence rate of the specific stabilizer low-concentration phase particles having 65 volume percent or more.

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.