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Effect of the polarity of KTa1−xNbxO3 on the dielectric performance of the KTN/PVDF nanocomposites
RSC Advances ( IF 3.9 ) Pub Date : 2020-7-13 , DOI: 10.1039/d0ra03859h
Jiaqi Lin 1, 2 , Yang Li 1 , Xinmei Liu 1 , Yuanshuo Li 1 , Weijie Zheng 1 , Wenlong Yang 1
Affiliation  

KTa1−xNbxO3 with different Ta/Nb ratios (x = 0.15, 0.25, 0.5, 0.75, 0.85) were engineered and prepared by a facile hydrothermal synthesis method to acquire KTN nanoparticles with varied polarity. To investigate the effect of KTN filler with varied polarity on the dielectric performance of polymer matrix composites, KTN/PVDF films were fabricated. The experiment demonstrated the polarity of KTN affected the dielectric performance of the composites. KTa0.5Nb0.5O3 possesses larger polarity with permittivity of 3780 at 1 kHz due to its Curie temperature is closer to room temperature, which contributes 30 wt% doped KTa0.5Nb0.5O3/PVDF composite achieving higher permittivity of 19.5 at 1 kHz than those of the others. Additionally, KTa0.75Nb0.25O3/PVDF composite presents higher breakdown strength than those of the others with an Eb value of 164 kV mm−1 when 20 wt% filler is doped. The significant improved dielectric performance by Ta/Nb ratio engineering has the potential of providing new insight on enhancing the energy storage in ceramic-polymer nanocomposites.

中文翻译:

KTa1−xNbxO3 的极性对 KTN/PVDF 纳米复合材料介电性能的影响

通过简便的水热合成方法设计和制备了具有不同 Ta/Nb 比 ( x = 0.15, 0.25, 0.5, 0.75, 0.85) 的KTa 1− x Nb x O 3以获得具有不同极性的 KTN 纳米粒子。为了研究不同极性的KTN填料对聚合物基复合材料介电性能的影响,制备了KTN/PVDF薄膜。实验证明KTN的极性影响复合材料的介电性能。KTa 0.5 Nb 0.5 O 3具有较大的极性,在 1 kHz 时的介电常数为 3780,因为它的居里温度更接近室温,贡献了 30 wt% 的掺杂 KTa 0.5 Nb0.5 O 3 /PVDF 复合材料在 1 kHz 时的介电常数比其他材料更高,为 19.5。此外,KTa 0.75 Nb 0.25 O 3 /PVDF复合材料在掺杂20 wt%填料时表现出比其他复合材料更高的击穿强度, E b值为164 kV mm -1 。通过 Ta/Nb 比率工程显着改善的介电性能有可能为增强陶瓷-聚合物纳米复合材料的能量存储提供新的见解。
更新日期:2020-07-13
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