Dielectric properties of poly(vinylidene luoride)/CaCu3Ti4O12 nanocrystal composite thick films

Thomas, P and Satapathy, S and Dwarakanath, KS and Varma, KBR (2010) Dielectric properties of poly(vinylidene luoride)/CaCu3Ti4O12 nanocrystal composite thick films. In: Express Polymer Letters, 4 (10). pp. 632-643.

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Abstract

The poly(vinylidene fluoride)/CaCu3Ti4O12 (CCTO) nanocrystal composite films (thickness approximate to 85 mu m) with relatively high dielectric permittivity (90 at 100 Hz) were prepared by the solution casting followed by spin coating technique. The structural, the microstructural and the dielectric properties of the composites were studied using X-ray diffraction, Scanning Electron Microscope, and Impedance analyzer respectively. The effective dielectric permittivity (e(eff)) of the composite increased with increase in the volume fraction of CCTO at all the frequencies (100 Hz to 1 MHz) under investigation. The room temperature dielectric permittivity which is around 90 at 100 Hz, has increased to about 290 at 125 degrees C (100 Hz). These results may be exploited in the development of high energy density capacitors.

Item Type:	Journal Article
Publication:	Express Polymer Letters
Publisher:	Budapest Univ Technol &Econ
Additional Information:	Copyright of this article belongs to Budapest Univ Technol &Eco.
Keywords:	Polymer composites; poly(vinylidene fluoride); CaCu3Ti4O12 oxide; nanocomposite; electrical properties.
Department/Centre:	Division of Chemical Sciences > Materials Research Centre
Date Deposited:	11 Oct 2010 07:05
Last Modified:	11 Oct 2010 07:05
URI:	http://eprints.iisc.ac.in/id/eprint/33145

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