Microstructure, dielectric, piezoelectric, and ferroelectric properties of fine-grained 0.94Na0.5Bi0.5TiO3-0.06BaTiO3 ceramics
| Autor: | Qian Zhang, Xiao-ming Chen, Jin-qiu Liu, Han-li Lian, Jia-ping Ma |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Materials science Ferroelectric ceramics 02 engineering and technology Dielectric 021001 nanoscience & nanotechnology Microstructure 01 natural sciences Piezoelectricity Ferroelectricity Grain size visual_art 0103 physical sciences Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Ceramic Composite material 0210 nano-technology Polarization (electrochemistry) |
| Zdroj: | Journal of the European Ceramic Society. 39:264-268 |
| ISSN: | 0955-2219 |
| Popis: | For preparing fine-grained 0.94Na0.5Bi0.5TiO3-0.06BaTiO3 lead-free ferroelectric ceramics, the precursor powders were synthesized via sol-gel method and calcined at various temperatures. The precursor powders calcined at 520 °C, 550 °C, and 600 °C exhibit mean grain sizes of 30 ± 4 nm, 54 ± 3 nm, and 78 ± 5 nm, respectively. By optimizing the synthesis parameters, the fine-grained ceramics with high relative densities (>97%) and mean grain size around 100 nm were prepared. The ferroelectric, dielectric, and piezoelectric behavior were investigated. The ceramics prepared using the different precursor powders show different piezoelectric, ferroelectric, and dielectric behavior. The ceramic calcined at 550 °C and sintered at 900 °C exhibits the breakdown strength higher than 85 kV/cm, which exhibits the maximum polarization of 38.4 ± 0.3 μC/cm2, remanent polarization of 20.6 ± 0.4 μC/cm2. |
| Databáze: | OpenAIRE |
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