TY - JOUR
T1 - Enhanced energy storage properties of NaNbO3 modified Bi0.5Na0.5TiO3 based ceramics
AU - Xu, Qi
AU - Li, Tianming
AU - Hao, Hua
AU - Zhang, Shujun
AU - Wang, Zhijian
AU - Cao, Minghe
AU - Yao, Zhonghua
AU - Liu, Hanxing
N1 - Publisher Copyright:
© 2014 Elsevier Ltd.
PY - 2015/2/1
Y1 - 2015/2/1
N2 - (1-x)BNTBT-xNN ceramics were prepared by conventional solid state reaction method. X-ray fluorescence analysis shows that the volatilization of Na element occurs during sintering process, the resulted concentration variation of V'Na-VO-V'Na defect dipoles facilitate the grain growth. XRD analysis and dielectric properties analysis indicate that rhombohedral polar phase and tetragonal weakly polar phase coexist in BNTBT ceramics at room temperature. By increasing the NN amount, the rhombohedral polar phase content sharply decreases, leading to a smaller remnant polarization. The dielectric anomaly corresponding to the depolarization temperature disappears from the temperature range investigated. According to the XRD results, the amount of tetragonal weakly polar phase decreases with increasing NN content and the structure evolves toward a pseudocubic symmetry. The phase structure change results in more slim P-E loops. The optimum energy storage properties was obtained for the composition of x=0.10, with energy storage density of 0.71J/cm3 at 7kV/mm and a good temperature stability around 25-150°C.
AB - (1-x)BNTBT-xNN ceramics were prepared by conventional solid state reaction method. X-ray fluorescence analysis shows that the volatilization of Na element occurs during sintering process, the resulted concentration variation of V'Na-VO-V'Na defect dipoles facilitate the grain growth. XRD analysis and dielectric properties analysis indicate that rhombohedral polar phase and tetragonal weakly polar phase coexist in BNTBT ceramics at room temperature. By increasing the NN amount, the rhombohedral polar phase content sharply decreases, leading to a smaller remnant polarization. The dielectric anomaly corresponding to the depolarization temperature disappears from the temperature range investigated. According to the XRD results, the amount of tetragonal weakly polar phase decreases with increasing NN content and the structure evolves toward a pseudocubic symmetry. The phase structure change results in more slim P-E loops. The optimum energy storage properties was obtained for the composition of x=0.10, with energy storage density of 0.71J/cm3 at 7kV/mm and a good temperature stability around 25-150°C.
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U2 - 10.1016/j.jeurceramsoc.2014.09.003
DO - 10.1016/j.jeurceramsoc.2014.09.003
M3 - Article
AN - SCOPUS:84908309876
SN - 0955-2219
VL - 35
SP - 545
EP - 553
JO - Journal of the European Ceramic Society
JF - Journal of the European Ceramic Society
IS - 2
ER -