TY - JOUR
T1 - Effect of grain size on the energy storage properties of (Ba0.4Sr0.6)TiO3 paraelectric ceramics
AU - Song, Zhe
AU - Liu, Hanxing
AU - Zhang, Shujun
AU - Wang, Zhijian
AU - Shi, Yatong
AU - Hao, Hua
AU - Cao, Minghe
AU - Yao, Zhonghua
AU - Yu, Zhiyong
N1 - Funding Information:
This work was supported by the Key Program of Natural Science Foundation of China (No. 50932004 ), the International Science and Technology Cooperation Program of China ( 2011DFA52680 ), the Natural Science Foundation of China (No. 51102189 , No. 51372191 ), the Program for New Century Excellent Talents in University (No. NCET-11-0685 ), and the Self-determined and Innovative Research Funds of WUT (No. 135101018 ).
PY - 2014/5
Y1 - 2014/5
N2 - (Ba0.4Sr0.6)TiO3 (BST) ceramics with various grain sizes (0.5-5.6μm) were prepared by conventional solid state reaction methods. The effect of grain size on the energy storage properties of BST ceramics (Tc≈-65°C) was investigated. With decreasing grain sizes, a clear tendency toward the diffuse phase transition was observed and the dielectric nonlinearity was reduced gradually, which can be explained by the Devonshire's phenomenological theory (from the viewpoint of intrinsic polarization). Based on the multi-polarization mechanism model, the relationship between the polarization behavior of polar nano-regions (the extrinsic nonlinear polarization mechanisms) and grain size was studied. The variation of the grain boundary density was thought to play an important role on the improvement of dielectric breakdown strength, account for the enhanced energy density, which was confirmed by the complex impedance spectroscopy analysis based on a double-layered dielectric model.
AB - (Ba0.4Sr0.6)TiO3 (BST) ceramics with various grain sizes (0.5-5.6μm) were prepared by conventional solid state reaction methods. The effect of grain size on the energy storage properties of BST ceramics (Tc≈-65°C) was investigated. With decreasing grain sizes, a clear tendency toward the diffuse phase transition was observed and the dielectric nonlinearity was reduced gradually, which can be explained by the Devonshire's phenomenological theory (from the viewpoint of intrinsic polarization). Based on the multi-polarization mechanism model, the relationship between the polarization behavior of polar nano-regions (the extrinsic nonlinear polarization mechanisms) and grain size was studied. The variation of the grain boundary density was thought to play an important role on the improvement of dielectric breakdown strength, account for the enhanced energy density, which was confirmed by the complex impedance spectroscopy analysis based on a double-layered dielectric model.
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U2 - 10.1016/j.jeurceramsoc.2013.11.039
DO - 10.1016/j.jeurceramsoc.2013.11.039
M3 - Article
AN - SCOPUS:84892482639
SN - 0955-2219
VL - 34
SP - 1209
EP - 1217
JO - Journal of the European Ceramic Society
JF - Journal of the European Ceramic Society
IS - 5
ER -