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Oxide-ion conductors have been widely used as catalytic, conductive, detecting and other materials under oxidizing, reducing, inert, mixed environments and the like. However, so far the evaluation of their oxygen-ion transport (such as oxide-ion conductivity and oxygen permeability) either is extrinsic or is limited only in oxidizing or inert environment. Herein, the evaluation of intrinsic oxygen-ion transport for oxide-ion conductors in all environments seems especially important. In this work, a new test system was designed to enable the oxide-ion conductors placing in single oxidizing, reducing, inert or mixed environment separately, which also realized all the oxygen-vacancy concentrations of oxide-ion conductors are in equilibrium in all environments. The intrinsic oxide-ion conductivity and oxygen permeability were evaluated in all environments, and the influencing factors regulated by environments also were analyzed to correlate the variation of oxygen-ion transport.
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