期刊
CERAMICS INTERNATIONAL
卷 42, 期 11, 页码 12796-12801出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2016.05.042
关键词
SrSnxTi(1-x)O3; Dielectric relaxation; Energy density
资金
- National Natural Science Foundation of China [51372191]
- National Key Basic Research Program of China (973 Program) [2015CB654601]
- International Science and Technology Cooperation Program of China [2011DFA52680]
SrSnxTi(1-x)O3 (x=0, 0.01, 0.03, 0.05, 0.07) dielectric ceramics were fabricated by the solid state reaction method. Significant refinement of grain size and improved resistivity were observed with the addition of Sn, accounting for effectively enhanced dielectric breakdown strength, beneficial for the energy storage applications. Impedance analysis was employed to calculate the conductivities of grain and grain boundary and resistance ratios (R-gb/R-g) of grain boundary to grain. The grain boundary effect was believed to dominate the modified macroscopic performance, which was confirmed by the complex impedance analysis. The optimal properties were achieved for samples with x=0.05, exhibiting a charge energy density of 1.1 J/cm(3) and an energy efficiency of 87%. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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