Significant enhancement of dielectric permittivity and percolation behaviour of La2-xSrxNiO4/poly(vinylidene fluoride) composites with different Sr doping concentrations

被引：7
作者：
Meeporn, Keerati [1 ]
Chanlek, Narong [2 ]
Thongbai, Prasit [3 ,4 ]
机构：
[1] Khon Kaen Univ, Fac Sci, Mat Sci & Nanotechnol Program, Khon Kaen 40002, Thailand
[2] Synchrotron Light Res Inst, Publ Org, 111 Univ Ave, Muang Dist 30000, Nakhon Ratchasi, Thailand
[3] Khon Kaen Univ, Fac Sci, Dept Phys, Khon Kaen 40002, Thailand
[4] Khon Kaen Univ, NANOTEC KKU RNN Nanomat Res & Innovat Energy, IN RIE, Khon Kaen 40002, Thailand
来源：
RSC ADVANCES | 2020年 / 10卷 / 05期
关键词：
POLYMER COMPOSITES; ENERGY DENSITY; NANOCOMPOSITES; THRESHOLD; CONSTANT; EFFICIENCY; NANOWIRES; FILLERS;
D O I：
10.1039/c9ra09719h
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The percolation behaviour and dielectric properties of La2-xSrxNiO4 (LSNO)/poly(vinylidene fluoride) (PVDF) composites with different Sr doping concentrations were investigated. The semiconducting LSNO filler particles with x = 0.2 (LSNO-1) and x = 0.4 (LSNO-2) were prepared using a chemical combustion method. The microstructures, thermal properties, and phase compositions of the polymer composites and filler particles were systematically investigated. The conductivity of the LSNO fillers increased with the Sr content and had an important impact on the dielectric properties of the LSNO/PVDF composites. The percolation threshold of the LSNO-2/PVDF composite was lower than that of the LSNO-1/PVDF composite. An ultra-high dielectric permittivity (epsilon') of 3384.7 (at 1 kHz and room temperature), which was approximately 340 times higher than that of pure PVDF, was obtained for the LSNO-2/PVDF composite with a filler volume fraction of 25 vol%. The enhanced dielectric properties were attributed to interfacial polarisation at the semiconductor-insulator interface, a micro-capacitor model, and the intrinsically remarkable dielectric properties of the LSNO ceramic.
引用
收藏
页码：2747 / 2756
页数：10
相关论文
共 42 条
[1]   Effect of Sr content on the crystal structure and electrical properties of the system La2-xSrxNiO4+δ (0 ≤ x ≤ 1) [J].
Aguadero, A. ;
Escudero, M. J. ;
Perez, M. ;
Alonso, J. A. ;
Pomjakushin, V. ;
Daza, L. .
DALTON TRANSACTIONS, 2006, (36) :4377-4383
[2]   Surface Plasmon Resonance Sensor Based on a Novel D-Shaped Photonic Crystal Fiber for Low Refractive Index Detection [J].
Chen, Xin ;
Xia, Li ;
Li, Chen .
IEEE PHOTONICS JOURNAL, 2018, 10 (01)
[3]   Core-shell structured Ag@C nanocables for flexible ferroelectric polymer nanodielectric materials with low percolation threshold and excellent dielectric properties [J].
Chen, Zhihui ;
Li, Hengfeng ;
Xie, Guangyou ;
Yang, Ke .
RSC ADVANCES, 2018, 8 (01) :1-9
[4]   Dielectric Behavior Characterization of a Fibrous-ZnO/PVDF Nanocomposite [J].
Dagdeviren, Canan ;
Papila, Melih .
POLYMER COMPOSITES, 2010, 31 (06) :1003-1010
[5]   Study on dielectric behavior of the ferroelectric poly(vinylidene fluoride)/Li and Ti codoped NiO composites [J].
Dang, Zhi-Min ;
Xu, Hai-Ping ;
Xie, Dan ;
Li, Li .
MATERIALS LETTERS, 2007, 61 (02) :511-515
[6]   Dielectric behavior and dependence of percolation threshold on the conductivity of fillers in polymer-semiconductor composites [J].
Dang, ZM ;
Nan, CW ;
Xie, D ;
Zhang, YH ;
Tjong, SC .
APPLIED PHYSICS LETTERS, 2004, 85 (01) :97-99
[7]   Effect of conductivity of filler on the percolation threshold of composites [J].
Deepa, K. S. ;
Kumari Nisha, S. ;
Parameswaran, P. ;
Sebastian, M. T. ;
James, J. .
APPLIED PHYSICS LETTERS, 2009, 94 (14)
[8]   Mechanism of high dielectric performance of polymer composites induced by BaTiO3-supporting Ag hybrid fillers [J].
Fang, Fang ;
Yang, Wenhu ;
Yu, Shuhui ;
Luo, Suibin ;
Sun, Rong .
APPLIED PHYSICS LETTERS, 2014, 104 (13)
[9]   Enhanced Dielectric Properties of LaNiO3/BaTiO3/PVDF: A Three-Phase Percolative Polymer Nanocrystal Composite [J].
Jaschin, P. W. ;
Bhimireddi, R. ;
Varma, K. B. R. .
ACS APPLIED MATERIALS & INTERFACES, 2018, 10 (32) :27278-27286
[10]   The route to resource-efficient novel materials [J].
Krohns, S. ;
Lunkenheimer, P. ;
Meissner, S. ;
Reller, A. ;
Gleich, B. ;
Rathgeber, A. ;
Gaugler, T. ;
Buhl, H. U. ;
Sinclair, D. C. ;
Loidl, A. .
NATURE MATERIALS, 2011, 10 (12) :899-901
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