Bi0.5Na0.5TiO3-BaTiO3-K0.5Na0.5NbO3:ZnO relaxor ferroelectric composites with high breakdown electric field and large energy storage properties

Bi0.5Na0.5TiO3-BaTiO3-K0.5Na0.5NbO3:ZnO relaxor ferroelectric composites with high breakdown electric field and large energy storage properties
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具有高击穿电场和大储能性能的Bi0.5Na0.5TiO3-BaTiO3-K0.5Na0.5NbO3:ZnO弛豫铁电复合材料

DOI:
10.1016/j.jeurceramsoc.2018.07.006
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发表时间:
2018-12
影响因子:
5.7
通讯作者:
Zhang Shan-Tao
Zhang Shan-Tao
中科院分区:
材料科学1区
文献类型:
--
作者:
Tao Chun-Wei;Geng Xiao-Yu;Zhang Ji;Wang Rui-Xue;Gu Zheng-Bin;Zhang Shan-Tao

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制备了0.82[0.94Bi0.5Na0.5TiO3-0.06BaTiO3]-0.18K0.5Na0.5NbO3:xZnO (BNT-BT-KNN:xZnO,x= 0-0.40)弛豫剂复合材料,并对其电学性能进行了研究。击穿电场随ZnO含量的增加而增大。在电场强度为9.0 kV/mm和14.0 kV/mm时,最大可回收储能密度分别为0.74 J/cm3和1.03 J/cm3,最大储能效率分别为86.7%和72.7%。在25 ℃~ 125 ℃范围内,复合材料的可恢复储能密度和效率变化小于2.5%,具有温度不敏感的储能性能。这些结果是基于zno增强的体电阻率和zno诱导的局部电场抑制极性纳米区的演化来讨论的。
0.82[0.94Bi0.5Na0.5TiO3-0.06BaTiO3]-0.18K0.5Na0.5NbO3:xZnO (BNT-BT-KNN:xZnO,x= 0-0.40) relaxor composites were prepared and their electrical properties were investigated. The breakdown electric field increases with increasing ZnO content. Forx= 0 andx= 0.40 samples, the maximum recoverable energy storage density is 0.74 J/cm3and 1.03 J/cm3while the maximum energy storage efficiency is 86.7% and 72.7% under the electric field of 9.0 kV/mm and 14.0 kV/mm, respectively. The recoverable energy storage density and efficiency of the composite vary less than 2.5% from 25 °C to 125 °C, which indicates temperature-insensitive energy storage performance. These results are discussed based on the ZnO-enhanced bulk resistivity and the ZnO-induced local electric field which suppresses the evolution of polar nanoregions.
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