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Flexible and low cost lead free composites with high dielectric constant
Affiliation:1. Department of Electrical Engineering, National University of Computer and Emerging Sciences, A.K. Brohi Road, 44000 Islamabad, Pakistan;2. State Key Laboratory Breeding Base of Nonferrous metals and specific Materials Processing, Guangxi universities key laboratory of non-ferrous metal oxide electronic functional materials and devices, College of Material Science and Engineering, Guilin University of Technology, Guilin 541004, China;3. College of Information Science and Engineering, Guilin University of Technology, Guilin 541004, China;4. Novel Aerospace Materials Group, Faculty of Aerospace Engineering, Delft University of Technology, Kluyverweg 1, 2629 HS Delft, The Netherlands;1. Laboratory of Electronic Functional Materials, Huizhou University, Huizhou 516001, Guangdong, PR China;2. Ecole Polytechnique, Mecanique Energetique, Technopole De Chateau-Gombert, 5 Rue Enrico Fermi, 13453 Marseille Cedex 13, France;1. State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi''an, 710072, PR China;2. Shaanxi Key Laboratory of Macromolecular Science and Technology, School of Science, Northwestern Polytechnical University, Xi''an, 710072, PR China
Abstract:Highly flexible lead free composite film having random distribution of ceramic filler was synthesized using Barium Titanate (BT) as a filler and inexpensive Thermoplastic Polyurethane (TPU) as a matrix. The results show that the 30 vol% BT-TPU composite has a dielectric constant of ~31 which is comparable to the expensive and difficult to produce PVDF based composites. With a breakdown field of 150 kV/mm, an energy density value of ~3 J/cm3 was estimated. These lead-free TPU based composites provide an alternative to PVDF based composites for energy storage applications.
Keywords:Flexible material  Ceramic composites  Lead free  Energy storage
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