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Electrical conductivity of polycrystalline BiVO4 samples having the scheelite structure |
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| Institution: | 1. School of Pharmaceutical and Materials Engineering, Taizhou University, Jiaojiang 318000, China;2. Faculty of Materials, Metallurgical and Chemistry, Jiangxi University of Science and Technology, Ganzhou 341000, China;3. Institute of Materials Science and Devices, Suzhou University of Science and Technology, Suzhou 215011, China |
| Abstract: | Polycrystalline samples of the scheelite oxide BiVO4 have been prepared with and without 1 m/o additions of CaO. Using impedance spectroscopy the electrical conductivity of these samples was measured in the temperature range 140–550°C and data for the low temperature regime (140–300°C) interpreted in terms of ionic conductivity due to oxygen ion vacancies. This interpretation suggested that the enthalpy of motion of anion vacancies in these materials is relatively low (∼ 0.33 eV). |
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