US 11,927,561 B2
Solid electrolyte for gas sensor and gas sensor
Makoto Noguchi, Kariya (JP); Satoshi Suzuki, Kariya (JP); and Mitsuhiro Yoshida, Kariya (JP)
Assigned to DENSO CORPORATION, Kariya (JP)
Filed by DENSO CORPORATION, Kariya (JP)
Filed on May 1, 2020, as Appl. No. 16/864,281.
Application 16/864,281 is a continuation of application No. PCT/JP2018/038083, filed on Oct. 12, 2018.
Claims priority of application No. 2017-213348 (JP), filed on Nov. 3, 2017.
Prior Publication US 2020/0256823 A1, Aug. 13, 2020
Int. Cl. G01N 27/407 (2006.01); C04B 35/486 (2006.01)
CPC G01N 27/4073 (2013.01) [C04B 35/486 (2013.01); C04B 2235/3246 (2013.01); C04B 2235/5436 (2013.01); C04B 2235/5445 (2013.01); C04B 2235/5454 (2013.01); C04B 2235/781 (2013.01); C04B 2235/785 (2013.01); C04B 2235/786 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A solid electrolyte for a gas sensor, the solid electrolyte comprising a partially stabilized zirconia that is comprised of zirconia and a stabilizer being in a solid solution in the zirconia;
wherein:
the partially stabilized zirconia comprises crystal particles,
the crystal particles include stabilizer low-concentration crystalline phase particles each being defined such that the concentration of the stabilizer of each of the stabilizer low-concentration crystalline phase particles is less than 4.7 mol %,
the partially stabilized zirconia comprises voids between the crystal particles, and
the stabilizer low-concentration crystalline phase particles in the partially stabilized zirconia include specific stabilizer low-concentration crystalline phase particles each having a distance of 5 μm or less from at least one adjacent void adjacent to the specific stabilizer low-concentration crystalline phase particle in the voids, a presence ratio of the specific stabilizer low-concentration crystalline phase particles being 65 volume percent or more, the distance being a distance between a center of the specific stabilizer low-concentration crystalline phase particle and a center of the at least one adjacent void.