Temperature dependent conductivity of Bi4Ti3O12 ceramics induced by Sr dopants
| Autor: | Haibo Jin, Gui Mengqi, Jingbo Li, Lin Wang, Naseer Muhammad Adnan, Yongjie Zhao, Xinyuan Hu |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
impedance analysis 02 engineering and technology Dielectric Conductivity 01 natural sciences lcsh:TP785-869 0103 physical sciences Aurivillius compound Ceramic Composite material dielectric defects 010302 applied physics Doping Atmospheric temperature range 021001 nanoscience & nanotechnology Microstructure Grain size Electronic Optical and Magnetic Materials lcsh:Clay industries. Ceramics. Glass visual_art electrical properties Ceramics and Composites visual_art.visual_art_medium Grain boundary 0210 nano-technology |
| Zdroj: | Journal of Advanced Ceramics, Vol 7, Iss 3, Pp 256-265 (2018) |
| ISSN: | 2227-8508 2226-4108 |
| DOI: | 10.1007/s40145-018-0277-1 |
| Popis: | Bi4Ti3O12 is an important lead-free ferroelectric material. Doping modification of Bi4Ti3O12 has attracted great attention to improving its performances. In this work, the effect of Sr dopants on the microstructure, dielectric, and conductivity of Bi4Ti3O12 ceramic was investigated by XRD, SEM, and AC impedance spectroscopy. Substitution of 1 at% Sr for Bi decreased the grain size, suppressed the dielectric dispersion of Bi4Ti3O12 ceramic at room temperature, and resulted in different effects on the conductivity of grains and grain boundaries. The conductivity of grains in Bi4Ti3O12 ceramic was increased by the small amount of Sr dopants in the whole experimental temperature range. While the grain boundaries of 1 at% Sr-doped Bi4Ti3O12 exhibited lower conductivity than pure Bi4Ti3O12 below ~380 °C and higher conductivity above ~380 °C. The experimental phenomena were interpreted in term of compensating defects for Sr dopants. |
| Databáze: | OpenAIRE |
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