The effect of doping on oxygen conductivity performance of Na0.5Bi0.5TiO3 compounds
| Autor: | Gang-Ling Hao, Xiangping Li, Weiguo Wang |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Materials science Doping Relaxation (NMR) Oxide Analytical chemistry chemistry.chemical_element Activation energy Conductivity Condensed Matter Physics 01 natural sciences Oxygen Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials chemistry.chemical_compound chemistry 0103 physical sciences Electrical performance Ionic conductivity Electrical and Electronic Engineering |
| Zdroj: | Journal of Materials Science: Materials in Electronics. 30:7901-7906 |
| ISSN: | 1573-482X 0957-4522 |
| DOI: | 10.1007/s10854-019-01110-9 |
| Popis: | The three different doped (Na, K and Mg) Na0.5Bi0.5TiO3 compounds were prepared. The grain conductivity of the doped Na0.5Bi0.5TiO3 compounds shows: Na-doping > K-doping > Mg-doping. Using the dielectric relaxation spectroscopy, the relaxation parameters can be obtained: ENa = 0.61 eV, EK = 0.64 eV and EMg = 0.68 eV. In the Na-doped Na0.5Bi0.5TiO3 compound, there exists the lowest activation energy, best oxygen vacancy mobility and the disorder decrease of A-site sub-lattice in the Na0.5Bi0.5TiO3 compound from the Na-doping on the A (Bi3+)-site, which are the possible reasons for the higher grain conductivity in the Na-doped Na0.5Bi0.5TiO3 compound. In the Mg-doped Na0.5Bi0.5TiO3 compound, despite the worst oxygen vacancy mobility, the concentration of mobilizable oxygen vacancies is almost highest, which can be adopted to increase the mobilizable oxygen vacancy concentration of the Na-doped Na0.5Bi0.5TiO3 compound. For the Na0.5Bi0.5TiO3 compound, the further improvement of the electrical performance can be expected for the slight amount Mg-doping on the Ti4+-sites in the Na-doped Na0.5Bi0.5TiO3 compound, which is meaningful to obtain the higher oxide ionic conductivity in the Na0.5Bi0.5TiO3 compounds. |
| Databáze: | OpenAIRE |
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