Improved dielectric energy storage performance of Na0.5Bi0.5TiO3–Sr0.7Nd0.2TiO3 lead-free ceramics by adding an appropriate amount of AgNbO3 |
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| Affiliation: | 1. Faculty of Materials and Energy, Southwest University, Chongqing, 400715, China;2. Electronic Materials Research Laboratory (Key Laboratory of the Ministry of Education) & International Center for Dielectric Research, School of Electronic Science and Engineering, Faculty of Electronic and Information Engineering, Xi''an Jiaotong University, Xi''an, 710049, China;3. Guangdong Provincial Key Laboratory of Electronic Functional Materials and Devices, Huizhou University, Huizhou, Guangdong, 516001, China |
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| Abstract: | Based on the significant advantages of dielectric ceramics in high power energy storage, (1-x) (0.55Bi0.5Na0.5TiO3-0.45Sr0.7Nd0.2TiO3)-xAgNbO3 (NBSNT-xAN) ceramics were prepared by traditional solid phase method. The introduction of AN in NBSNT ceramics not only increased the degree of relaxation, but also refined the grain size, enhanced the BDS, and finally improved the energy storage performance. It is found that the NBSNT-0.5AN ceramics obtained an effective energy storage density as high as 3.08 J/cm3 and an efficiency of 79.94%. In addition, good thermal stability and temperature stability were exhibited in the range of 30–120 °C and 10–350 Hz, and at the same time, it performed very well in the pulsed test at room temperature and variable temperatures. This provides a design idea for the miniaturization and integration of energy storage ceramic materials. |
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| Keywords: | Charge and discharge Energy storage density Antiferroelectric Ferroelectric |
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