High-Energy Storage Density and Efficiency of (1-x)[0.94 NBT-0.06 BT]-xST Lead-Free Ceramics
High-Energy Storage Density and Efficiency of (1-x)[0.94 NBT-0.06 BT]-xST Lead-Free Ceramics
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DOI：
10.1002/ente.201500173
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发表时间：
2015-12-01
影响因子：
3.8
通讯作者：
Fei, Weidong
中科院分区：
文献类型：
--
作者：
Cao, Wenping;Li, Weili;Fei, Weidong
以钛酸钡（BaTiO_3，BT）、钛酸锶（SrTiO_3，ST）和钛酸铋钠[（Na_（1/2）Bi_（1/2））TiO_3，NBT]为原料，采用常规工艺制备了（1-x）[0.94NBT-0.06BT]-xST反铁电无铅陶瓷。研究了陶瓷的微观结构、电性能和储能性能。结果表明，ST的加入可以增大材料的最大极化强度（P-max）和剩余极化强度（P-r）之差，从而提高材料的储能性能。当x = 0.30时，在90 kVcm（-1）下获得了最大可回收能量密度0.98 Jcm（-3）和82%的相对高效率，在室温至120 ℃的温度范围内也显示出优异的储能稳定性。
Using the component materials barium titanate (BaTiO3, BT), strontium titanate (SrTiO3, ST), and sodium bismuth titanate [(Na1/2Bi1/2)TiO3, NBT], anti-ferroelectric lead-free ceramics of (1-x)[0.94NBT-0.06BT]-xST have been fabricated using conventional techniques. The microstructure, electrical properties, and energy-storage performance of the obtained ceramics were investigated in detail. It was determined that the addition of ST can enhance the difference between the maximum polarization (P-max) and remnant polarization (P-r), resulting in the improvement of the energy-storage properties. The maximum recoverable energy density of 0.98 Jcm(-3) with a relatively high efficiency of 82% was achieved under 90 kVcm(-1) at x = 0.30, which also displayed excellent energy-storage stability in the temperature range from room temperature to 120 degrees C.