Microstructure-dependent electrical properties of Bi0.5Na0.5TiO3–BaTiO3–SrTiO3 ternary solid solution
| Autor: | Lagen Kumar Pradhan, Suman Kumari, Murli Kumar Manglam, Rabichandra Pandey, Manoranjan Kar |
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| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Materials science Condensed matter physics Sintering Relative permittivity Condensed Matter Physics Thermal diffusivity Microstructure 01 natural sciences Atomic and Molecular Physics and Optics Grain size Electronic Optical and Magnetic Materials Electrical resistivity and conductivity 0103 physical sciences Grain boundary Electrical and Electronic Engineering Electroceramics |
| Zdroj: | Journal of Materials Science: Materials in Electronics. 32:6607-6622 |
| ISSN: | 1573-482X 0957-4522 |
| DOI: | 10.1007/s10854-021-05376-w |
| Popis: | The evolution of microstructure (grain size) with the sintering temperature and its effect on the electrical properties has been investigated for ((Bi0.5Na0.5)0.94Ba0.06)0.70Sr0.30TiO3 [BNBSTO] electroceramic. The X-ray diffraction patterns and the Rietveld refinements reveal the formation of the single phase with perovskite structure. The relative dielectric constant increases with the sintering temperature up to 1175 °C. Temperature-dependent relative permittivity shows the dispersive nature with the diffuse electrical phase transitions. The diffusivity of the electrical properties of the electroceramics has been estimated using the Curie–Weiss law. It is observed that the electrical diffuseness decreases with the increase of the grain size. The Nyquist plots reveal the role of grains and grain boundaries on the electrical conductivity of the electroceramic. Also, the grain size affects the ferroelectric properties which directly influences the energy storage density. |
| Databáze: | OpenAIRE |
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