Abstract
Dielectric ceramic capacitors, as one kind of important electrical energy-storage device, have been widely used because of their high-power density and low cost. It is a key challenge and of great significance to develop dielectric ceramic capacitors with high energy-storage density within a wide operate temperature range. In this work, the effect of the Bi(Mg0.5Zr0.5)O3 addition on the dielectric and energy-storage properties of lead-free Ba0.8Sr0.2TiO3 ceramics was systematically studied. It can be found that with increasing Bi(Mg0.5Zr0.5)O3 content, an increase in dielectric temperature stability as a result of the addition of Bi(Mg0.5Zr0.5)O3 can accompany the formation of the long-range ordered ferroelectric domain into polar nanoregions and also conform to a decrease in remanent polarization and an increase in energy-storage properties. As a result, for the composition 0.92Ba0.8Sr0.2TiO3-0.08Bi(Mg0.5Zr0.5)O3, a stable dielectric constant in a temperature range of −100–151 °C was achieved. Furthermore, a large recoverable energy-storage density value (3.44 J/cm3) and a high-power density value (541 MW/cm3) were obtained simultaneously in the above ceramic composition. All these features suggest that the 0.92Ba0.8Sr0.2TiO3-0.08Bi(Mg0.5Zr0.5)O3 ceramics might be ideal materials for potential applications of high energy-storage capacitors.
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Data supporting the findings of this work are available from the corresponding author, R.Z. Zuo, upon request.
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The authors acknowledge financial support from the National Key Research and Development Program of China (2022YFB3807403), the Natural Science Foundation of Anhui Provincial Education Department (2022AH050979), the Scientific Research Starting Foundation of Anhui Polytechnic University (2021YQQ031).
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Li, T., Yang, X., **e, A. et al. Lead-free X8R-type 0.92Ba0.8Sr0.2TiO3-0.08Bi(Mg0.5Zr0.5)O3 dielectric energy-storage ceramics for pulsed power capacitors. J Mater Sci 58, 11761–11770 (2023). https://doi.org/10.1007/s10853-023-08742-7
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DOI: https://doi.org/10.1007/s10853-023-08742-7