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Novel barium titanate based ferroelectric relaxor ceramics with superior charge-discharge performance |
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| Authors: | Feng Li Mingxing Zhou Jiwei Zhai Bo Shen Huarong Zeng |
| Affiliation: | 1. Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education, Functional Materials Research Laboratory, School of Materials Science & Engineering, Tongji University, 4800 Caoan Road, Shanghai 201804, China;2. Key Laboratory of Inorganic Functional Materials and Devices, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China;3. University of Chinese Academy of Sciences, Beijing 100049, China |
| Abstract: | Lead-free 0.9BaTiO3-0.1(Bi0.9Na0.1)(In0.8Zr0.2)O3 (0.9BT-0.1BNIZ) ferroelectric relaxor ceramic was synthesized by solid-state reaction method. A dense microstructure and fine grain size was obtained with addition of BNIZ content. The dielectric behaviors indicated the dominance of ergodic relaxor phase. The 0.9BT-0.1BNIZ ceramic was found to possess an enhanced recoverable energy density (WR～1.33?J/cm3) and efficiency (η～88%) under 18?kV/mm at room temperature. What’s more, WR is maintained ≥0.53?J/cm3 with η?≥?94% under 10?kV/mm and the variation of WR is less than 15% over 25～140?°C. The high stability of energy storage properties is mainly ascribed to the characteristics of ergodic relaxor phase. The stored energy was released in sub-microseconds (～0.19?μs). The superior current density (CD～796?A/cm2) and the power density (PD～39.8?MW/cm3) were obtained simultaneously. The enhanced WR and the superior charge-discharge performances strongly demonstrate that the BT-based ceramics are promising candidates of high-power pulse capacitor applications. |
| Keywords: | Energy storage Charge-discharge Ferroelectric relaxor |
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