Enhanced energy-storage performance and temperature-stable dielectric properties of (1-x)[(Na0.5Bi0.5)0.95Ba0.05]0.98La0.02TiO3-xK0.5Na0.5NbO3 lead-free ceramics
| Autor: | Huiqing Fan, Mingchang Zhang, Arun Kumar Yadav, Haijun Peng, Guangzhi Dong, Jianan Sui, Wang Chao, Jiangwei Ma |
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| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Materials science Process Chemistry and Technology Doping 02 engineering and technology Dielectric Atmospheric temperature range 021001 nanoscience & nanotechnology 01 natural sciences Energy storage Surfaces Coatings and Films Electronic Optical and Magnetic Materials law.invention Capacitor law visual_art 0103 physical sciences Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Dielectric loss Crystallite Ceramic Composite material 0210 nano-technology |
| Zdroj: | Ceramics International. 45:20427-20434 |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2019.07.019 |
| Popis: | Polycrystalline (1-x)[(Na0.5Bi0.5)0.95Ba0.05]0.98La0.02TiO3-xK0.5Na0.5NbO3 systems were prepared using the solid-state reaction technique. Modification of (Na0.5Bi0.5)0.95Ba0.05]0.98La0.02TiO3 ceramic with a proper amount of K0.5Na0.5NbO3 can effectively improve the temperature-stable of dielectric properties. A variation in dielectric constant is maintained smaller than ±5% from 80 to 300 °C accompanied with a low dielectric loss (≤0.04). The relaxor properties of the doped samples are significantly enhanced. A high energy storage density of 1.1 J/cm3 and efficiency ~80% at 90 kV/cm are achieved in the x = 0.05 composition. Hence, the as-prepared ceramics might be practical in dielectric constant which can work stably at a high temperature range and pulsed capacitors. |
| Databáze: | OpenAIRE |
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