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Advances in Materials Science and Engineering
Volume 2013 (2013), Article ID 125634, 7 pages
http://dx.doi.org/10.1155/2013/125634
Research Article

Dielectric and Ferroelectric Properties of Lead-Free Ceramic System

1Department of Physics and Material Science & Engineering, Jaypee Institute of Information Technology, Noida 201307, India
2Electroceramics Group, Solid State Physics Laboratory, Timarpur, Delhi 110054, India

Received 31 May 2013; Revised 20 July 2013; Accepted 22 July 2013

Academic Editor: Amit Bandyopadhyay

Copyright © 2013 Vijayeta Pal 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.

Abstract

Lead-free specimens of [-BaTiO3] (BLNLT-BT, where , , and , 0.02, 0.04, and 0.06) ceramic system were synthesized by a semiwet technique. In the present study, we have investigated the effect of Ba on the structure, morphology, and dielectric, ferroelectric, and piezoelectric properties of BLNLT system. The XRD patterns of all the specimens showed rhombohedral structure at room temperature. Field emission scanning electron microscopy images (FE-SEM) showed grain growth inhibition with Ba content in BLNLT system. The temperature dependence of dielectric constant revealed that the temperature of maximum dielectric constant “” and depolarization temperature “” decreased for the sample and showed high value of dielectric constant with low dielectric loss. These samples exhibited nonlinear behaviour of hysteresis loop. The values of dielectric constant (), dissipation factor (tan δ), piezo charge coefficient (), remnant polarization (), and coercive field () for the composition were 1495, 0.06, 20 pC/N, 5 μC/cm2, and 10.5 kV/cm, respectively.