Abstract
Trivalent rare earth dysprosium doped strontium titanate ceramics with B–site charge balanced formula of Dy x Sr1–x Ti1–x/4O3 (DyST, x = 0.01, 0.02, 0.03, and 0.04) were prepared by solid state reaction method. Single phase with cubic perovskite structure was indexed for all DyST ceramics from their x–ray diffraction patterns. Dense microstructures with grain size lower than 5 μm were observed for DyST ceramics using scanning electron microscope. Both high dielectric constant (ε r = 3300 at 1 kHz) and strong breakdown strength (E b > 150 kV/cm) were obtained for DyST ceramics with the composition of x = 0.02. Together with good stability of ε r vs. bias electric fields and low dielectric loss (tanδ < 0.03 at 1 kHz), the DyST ceramics should be very promising for high voltage energy storage capacitors.
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This work was financially supported by National Natural Science Foundation of China (Grant nos. 51102121 and 51262011), Science Foundation of Jiangxi Provincial Department of Education (Grant no. KJLD13076) and Young Scientists Cultivation Program of Jiangxi Province (Grant no. 20142BCB23020).
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Shen, Z., Li, Y., Hu, Q. et al. Dielectric properties of B–site charge balanced Dy–doped SrTiO3 ceramics for energy storage. J Electroceram 34, 236–240 (2015). https://doi.org/10.1007/s10832-014-9980-7
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DOI: https://doi.org/10.1007/s10832-014-9980-7