| http://www.w3.org/ns/prov#value | - Examples of the material for the porous conductors which are present on both surfaces of the ion permeation layer comprising the solid electrolyte are preferably noble metals such as platinum, palladium, rhodium, silver, etc., and oxides of these, oxides consisting of a perovskite oxides having a general formula of La1-x Srx BO3 (in which B is an element such as Co, Cu, Fe, Ni, etc., and x is a nu
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