| abstract |
Solid oxide form having high strength average value and high Weibull coefficient, stable mechanical strength characteristics, and high adhesion to the electrode formed on the surface thereof, and suppressing interfacial peeling from the electrolyte sheet of the electrode An electrolyte sheet for a fuel cell is provided. An electrolyte sheet for a solid oxide fuel cell has a plurality of depressions and / or protrusions on at least one surface, and the base surface shape of the depressions and protrusions is circular, elliptical or apex shape. Is a rounded polygon having a curvature radius of 0.1 μm or more, and / or a solid shape having a hemispherical shape, a semi-elliptical spherical shape, or a cross-sectional shape of a vertex and a ridge having a curvature radius of 0.1 μm or more. It is a polyhedron, the average equivalent circle diameter of the base of the depression and the protrusion is 0.5 μm or more and 250 μm or less, the average depth of the depression and the average height of the protrusion is 0.3 μm or more and 50 μm or less, And average thickness is 100 micrometers or more and 400 micrometers or less. [Selection figure] None |