Table of Contents
Journal of Composites
Volume 2014 (2014), Article ID 769379, 9 pages
Research Article

Mechanical and Dielectric Behaviour of CaCu3Ti4O12 and Nb Doped CaCu3Ti4O12 Poly(vinylidene fluoride) Composites

1Department of Ceramic Engineering, Indian Institute of Technology (Banaras Hindu University), Varanasi 221005, India
2School of Material Science and Technology, Indian Institute of Technology (Banaras Hindu University), Varanasi 221005, India

Received 22 August 2014; Accepted 25 November 2014; Published 14 December 2014

Academic Editor: Masamichi Kawai

Copyright © 2014 Anshuman Srivastava et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


PVDF has been reinforced with different amount of CaCu3Ti4-5x/4NbxO12 with powder prepared by solid state ceramic method. Composites were prepared by melt extrusion method. Phase composition was studied using powder X-ray diffraction (XRD). Microstructural, dielectric, and mechanical properties have also been studied. These composites have Young’s modulus more than that of pure PVDF. Two dielectric relaxations, one at low frequency and the other at high frequency, have been observed in these composites. Dielectric relaxation at low frequencies is of Maxwell-Wagner type while the one observed at high frequency is due to hopping of electrons among different valent states of transition metal ions. Nature of dielectric relaxation has been analysed using H-N function.