| CPC G01N 27/4073 (2013.01) [G01N 27/4075 (2013.01); G01N 27/409 (2013.01)] | 20 Claims |
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1. A solid electrolyte assembly comprising:
a substrate;
a solid electrolyte disposed on or above the substrate; and
a first electrode and a second electrode that are arranged opposed to each other via the solid electrolyte,
wherein the solid electrolyte has oxide ion conductivity,
at least a portion of the first electrode is located between the substrate and the solid electrolyte and contains a porous material,
in a plan view of the solid electrolyte assembly, the first electrode has only one oxygen diffusion path that is formed overlapping the substrate and the solid electrolyte, and
the solid electrolyte assembly satisfies the condition that Sr/Sp is from 1.0×10−7 to 6.9×10−4,
wherein Sr represents a smallest cross-sectional area that is a cross-sectional area of the oxygen diffusion path at a location where an area of a cross section of the first electrode taken perpendicularly to an oxygen diffusing direction is smallest in a portion of the oxygen diffusion path where the oxygen diffusion path overlaps the substrate and the solid electrolyte in the plan view of the solid electrolyte assembly, and
Sp represents an area of a region where the first electrode and the second electrode overlap each other in a plan view of the solid electrolyte.
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