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US 12,111,282 B2Granted
Solid electrolyte and gas sensor with thermal shock resistance
AssigneeDenso Corporation
InventorsMitsuhiro Yoshida, Satoshi Suzuki
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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.
Claims4
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.
1 more element
Dependencies are inferred from the claim text.