Abstract
B2O3–SiO2–Bi2O3–CaO–BaO glass was used to lower the sintering temperature of paraelectric Ba0.3Sr0.7TiO3 ceramics. The effect of B2O3–SiO2–Bi2O3–CaO–BaO glass doping amount on the structure, dielectric properties and energy storage characteristics of the ceramics was investigated. Due to the doping of glass, the room temperature dielectric constant of the ceramics was gradually decreased from 650 to 380 (@ 1 kHz), while the electrical breakdown strength enhanced by > 20%. Especially, the dielectric loss of the ceramics at high temperatures (> 150 °C) was strongly reduced after glass doping. At the measuring temperature of 200 °C, the dielectric loss of glass doped Ba0.3Sr0.7TiO3 ceramics (tanδ < 3%) was markedly lower than that of pure Ba0.3Sr0.7TiO3 one (tanδ > 25%). The ceramics with glass doping amount of 2.0 wt.% sintered at a lowered temperature of 1150 °C, possessing a relatively high energy storage density (γ = 0.47 J/cm3) and efficiency (η = 90.3%) under an applied electric field of 135 kV/cm, should be promising for solid state compact pulsed power electronics at elevated temperatures.
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Acknowledgements
This work was financially supported by National Natural Science Foundation of China (51767010 and 61671224), Young Scientists Cultivation Program of Jiangxi Province (20142BCB23020), Natural Science Foundation of Jiangxi Province of China (20151BAB206014) and Innovative Project for Undergraduate Students of Jiangxi Province.
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Shen, ZY., Yu, YY., Wang, Y. et al. Reduced high temperature dielectric loss in BSB glass modified Ba0.3Sr0.7TiO3 ceramics for energy storage. J Mater Sci: Mater Electron 29, 1093–1097 (2018). https://doi.org/10.1007/s10854-017-8010-3
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DOI: https://doi.org/10.1007/s10854-017-8010-3