Enhanced energy storage properties of NaNbO3 and SrZrO3 modified Bi0.5Na0.5TiO3 based ceramics
Enhanced energy storage properties of NaNbO3 and SrZrO3 modified Bi0.5Na0.5TiO3 based ceramics
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NaNbO3和SrZrO3改性Bi0.5Na0.5TiO3基陶瓷的增强储能性能
DOI：
10.1016/j.jallcom.2017.05.162
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发表时间：
2017
影响因子：
6.2
通讯作者：
Zhao Gaoyang
中科院分区：
文献类型：
--
作者：
Liu Zicheng;Ren Pengrong;Long Changbai;Wang Xin;Wan Yuhui;Zhao Gaoyang
采用固相反应法制备了（0.9-x）[0.92Bi0.5Na0.5TiO3-0.08BaTiO3]-xSrZrO 3 -0.10NaNbO3（x = 0，0.02，0.04，0.06，0.08，0.10，简称BNTBT-100 xSZ-NN）无铅铁电陶瓷。XRD Rietveld精修表明，样品中R3 c和P4 bm相共存，P4 bm弱极性相占90%。BNT-100 xSZ-NN的介电常数在ε ′-T曲线上表现出较宽的峰值。由于SrZrO 3和NaNbO 3的加入打破了大范围的铁电有序，并增强了弱极性区，从而获得了纤细的P-E电滞回线。当x = 0.08时，材料具有优异的储能性能，在110 kV/cm的电场下储能密度高达0.95 J/cm 3，在25-175 °C的温度范围内变化较小（7%）。
The (0.9-x)[0.92Bi0.5Na0.5TiO3-0.08BaTiO3]-xSrZrO3-0.10NaNbO3(x = 0, 0.02, 0.04, 0.06, 0.08, 0.10, abbreviated as BNTBT-100xSZ-NN) lead-free ferroelectric ceramics were prepared by conventional solid state reaction method. XRD Rietveld refinement indicates that R3c and P4bm phases coexist in the sample, while P4bm weakly polar phase accounts for a large proportion of 90%. BNT-100xSZ-NN shows broad permittivity peaks in the ɛ′-T curves. Slim P-E ferroelectric hysteresis loops are obtained due to the long range of ferroelectric order broken by the addition of SrZrO3and NaNbO3as well as the enhancement of the weakly polar region. The excellent energy storage properties are obtained at the composition of x = 0.08, which has high energy storage density of 0.95 J/cm3at the electric field of 110 kV/cm and small variation (7%) in the temperature range of 25–175 °C.