Dash, Swagatika and Choudhary, R. N. P. and Kumar, Ashok and Goswami, M. N. (2019) Enhanced dielectric properties and theoretical modeling of PVDF–ceramic composites. Journal of Materials Science: Materials in Electronics, 30 (21). pp. 19309-19318. ISSN 0957-4522

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The ceramic-polymer composites, consisting of (Bi0.5K0.5)(Fe0.5Nb0.5)O-3 [BKFN] as fillers and poly (vinylidene fluoride) (PVDF) as matrix, with different ratios (weight ratio of BKFN to PVDF, are 10%, 30% and 50%) have been prepared by using a solution casting method. The X-ray diffraction (XRD) pattern evidenced a semi-crystalline structure containing mixed alpha-, beta- and gamma- phases of PVDF which was further confirmed by Fourier transform-infrared spectroscopy. Using scanning electron micrograph, the dispersion of the particulate filler in PVDF matrix is examined. With an increase of BKFN content, in the BKFN-PVDF composite films, both the dielectric constant and remnant polarizations showed a remarkable increase as compared to those of PVDF. Different theoretical models were proposed with experimental data to determine the effective dielectric constants of the prepared composites. Also, increased optical band gap is observed due to addition of BKFN in PVDF.

Item Type: Article
Additional Information: Copyright for this article belongs to M/s Springer Verlag.
Subjects: Engineering > Electronics and Electrical Engineering
Materials Science
Applied Physics/Condensed Matter
Depositing User: Mr. Yogesh Joshi
Date Deposited: 02 Mar 2020 07:37
Last Modified: 02 Mar 2020 07:37
URI: http://npl.csircentral.net/id/eprint/4176

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