US 12,111,282 B2
Solid electrolyte and gas sensor with thermal shock resistance
Mitsuhiro Yoshida, Kariya (JP); and Satoshi Suzuki, Kariya (JP)
Assigned to DENSO CORPORATION, Kariya (JP)
Filed by DENSO CORPORATION, Kariya (JP)
Filed on Sep. 24, 2021, as Appl. No. 17/448,733.
Application 17/448,733 is a continuation of application No. PCT/JP2020/006214, filed on Feb. 18, 2020.
Claims priority of application No. 2019-059103 (JP), filed on Mar. 26, 2019.
Prior Publication US 2022/0011259 A1, Jan. 13, 2022
Int. Cl. G01N 27/407 (2006.01); C04B 35/486 (2006.01); G01M 15/10 (2006.01); G01N 27/409 (2006.01)
CPC G01N 27/4073 (2013.01) [C04B 35/486 (2013.01); C04B 2235/3225 (2013.01); C04B 2235/3246 (2013.01); C04B 2235/9607 (2013.01); G01M 15/102 (2013.01); G01N 27/4071 (2013.01); G01N 27/409 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A solid electrolyte comprising partially stabilized zirconia,
wherein:
in the solid electrolyte, an yttria content of the partially stabilized zirconia is in a range of 4.5 mol % or more and 8 mol % or less; and
a change rate of a crystallite diameter for a cubic phase in crystal particles constituting the solid electrolyte configured by a fired and annealed body produced after performing an annealing treatment, before heating from room temperature to 1200° C. and after cooling from 1200° ° C. to room temperature in a cold-hot cycle, is 4% or less, and the annealing treatment heats the fired body comprising the partially stabilized zirconia to produce the fired and annealed body.