Abstract
Na0.5Bi0.5Cu3Ti4O12 (NBCTO)/poly(vinylidene fluoride) (PVDF) composites with various NBCTO volume fractions were prepared via solution mixing and hot pressing process. The structure, morphology, and dielectric properties of the composites were characterized with X-ray diffraction (XRD), thermal-gravimetric analysis (TGA), scanning electron microscope (SEM), and broadband dielectric spectrometer. The dielectric constant (ε) and dielectric loss (tan δ) of the composites were both found to increase with increasing NBCTO volume fraction within the frequency range of 1–106 Hz at room temperature. Relatively high dielectric constant of 79.8 and low loss of 0.21 at 1 kHz were obtained for the NBCTO/PVDF composite with 50 vol% NBCTO. Additionally, theoretical models like Logarithmic mixture rule, Maxwell–Garnet, Effective medium theory, and Yamada model were also employed to predict the dielectric constant of these composites. The values obtained by the EMT model are in close agreement with the experimental values.
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Acknowledgements
This study was funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions and Natural Science Foundation of Jiangsu Higher Education Institutes (13KJB430021). It was also partially supported by the National Natural Science Foundation of China under Grant of 21074087.
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Su, Yl., Sun, C., Zhang, Wq. et al. Fabrication and dielectric properties of Na0.5Bi0.5Cu3Ti4O12/poly(vinylidene fluoride) composites. J Mater Sci 48, 8147–8152 (2013). https://doi.org/10.1007/s10853-013-7627-8
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DOI: https://doi.org/10.1007/s10853-013-7627-8