Research on the proton conduction and electrochemical properties of CaZr0.98−xIn0.02AlxO3−α
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A solid-state electrolyte CaZr0.98−xIn0.02AlxO3−α (x = 0.002, 0.004, 0.006, and 0.008) was prepared using a solid-state reaction method at the temperatures of 1823 K and 1873 K for 10 h. The structures, micromorphologies, and electrical conductivities of these materials were investigated. The results show that CaZr0.98−xIn0.02AlxO3−α has a pure CaZrO3 perovskite phase structure. The electrical conductivities are approximately 1.86 × 10−8–7.13 × 10−6 S/cm at 1073–1273 K, and they significantly increase with increasing temperature under the same atmospheric conditions and gradually increase with increasing water vapor or oxygen partial pressure. This high-temperature proton conductor material would be used as hydrogen sensors of molten metals.
KeywordsPerovskite Proton conductor Hydrogen sensor Electrochemical properties
This work was supported in part by a grant from the National Natural Science Foundation of China (nos. 51464038 and 51864038), the Innovation Fund Project of Inner Mongolia University of Science and Technology (no. 2017YQL01), and the Inner Mongolia Autonomous Region Science and Technology Innovation Guide Reward Fund Project (no. 2017CXYD-7).
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