Effects of composition and temperature on energy storage properties of (Pb, La)(Zr,Sn,Ti)O3 antiferroelectric ceramics
Effects of composition and temperature on energy storage properties of (Pb, La)(Zr,Sn,Ti)O3 antiferroelectric ceramics
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成分和温度对(Pb,La)(Zr,Sn,Ti)O-3反铁电陶瓷储能性能的影响
DOI：
10.1016/j.ceramint.2017.06.005
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发表时间：
2017
影响因子：
5.2
通讯作者：
Yunbin He
中科院分区：
文献类型：
--
作者：
Qingfeng Zhang;Yu Dan;Jian Chen;Yinmei Lu;Tongqing Yang;Xi Yao;Yunbin He
研究了Zr 4+对（Pb 0. 97 La 0. 02）（ZrxSn 0. 945 − xTi 0. 055）O3（PLZST）反铁电陶瓷相结构和储能性能的影响，旨在优化反铁电陶瓷的组成以提高其储能性能。随着Zr ~（4+）含量在x=0.65 ~ 0.85范围内的增加，随着Zr ~（4+）离子半径的增大，随着Zr ~（4+）离子对Sn ~（4+）离子的取代，样品的容限因子逐渐减小，样品的铁电-反铁电相变电场（EA）由四方相逐渐转变为正交相。EA的增加导致可回收能量密度（Ure）从3.18J/cm ~ 3（x=0.65）提高到4.38J/cm ~ 3（x=0.8）。当Zr ~（4+）含量大于0.8时，由于饱和极化强度的降低，U_（max）从4.38 J/cm ~ 3降低到4.12 J/cm ~ 3（x=0.85）。当Zr ~（4+）含量为x=0.8时，PLZST正交晶系AFE陶瓷的储能性能最好，在30-90 °C范围内，最大能量释放率为4.38 J/cm ~ 3，且变化很小（<2.1%）。该陶瓷具有很高的居里温度，在很宽的温度范围内保持了AFE相的稳定性。高的储能密度和良好的温度稳定性表明（Pb0.97La0.02）（Zr0.8Sn0.145Ti0.055）O3反铁电陶瓷是一种很有前途的宽温高性能脉冲功率电容器材料。
In this work, the effects of Zr4+addition on the phase structure and energy storage properties of (Pb0.97La0.02)(ZrxSn0.945−xTi0.055)O3(PLZST) antiferroelectric (AFE) ceramics were investigated, aiming to optimize the composition for enhanced energy storage properties. Due to the substitution of Zr4+with larger ion radius for Sn4+, the tolerance factor of PLZST AFE ceramics decreased and thus the AFE state transformed gradually from tetragonal phase to orthorhombic phase with higher ferroelectric-antiferroelectric phase switching electric field (EA) with increasing Zr4+content from x=0.65–0.85. The increase ofEAled to the improvement of recoverable energy density (Ure) from 3.18 J/cm3(x=0.65) to 4.38 J/cm3(x=0.8). However, when Zr4+content was more than 0.8, theUredecreased from 4.38 J/cm3to 4.12 J/cm3(x=0.85) due to the reduction of the saturation polarization. The best energy storage properties were achieved in PLZST orthorhombic AFE ceramic with Zr4+content of x=0.8, which exhibited a maximumUreof 4.38 J/cm3and very smallUrevariation (<2.1%) in the range of 30–90 °C. The good temperature stability was attributed to the high Curie temperature of the ceramic which stabilized the AFE phase in a wide temperature range. The high energy storage density and good temperature stability demonstrate that (Pb0.97La0.02)(Zr0.8Sn0.145Ti0.055)O3antiferroelectric ceramic is a promising material for developing high-performance pulse power capacitors usable in wide temperature range.