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Advances in Materials Science and Engineering
Volume 2013, Article ID 198247, 8 pages
http://dx.doi.org/10.1155/2013/198247
Research Article

Conductivity of the PGT Synthesized by the High Energy Ball Milling (HEBM)

1School of Applied Sciences, KIIT University, Bhubaneswar, Odisha 751024, India
2Plasma Physics Research Center, Science and Research Branch, Islamic Azad University, Tehran, Iran

Received 1 May 2013; Accepted 4 September 2013

Academic Editor: Amit Bandyopadhyay

Copyright © 2013 S. K. S. Parashar 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

Nanocrystalline (where ) abbreviated as PGT has been synthesised by high energy ball milling at room temperature. Milling was continuous and X-ray analysis shows that single phase tetragonal structure of nanocrystalline PGT was formed after 15 h milling. The average crystallite size was found to be 17 nm. The frequency dependent ac conductivity of the PGT ceramic was studied in the range °C. Complex impedance analysis suggested the dielectric relaxation to be of non-Debye type. The activation energy was found to be 1.04 ev. The mechanism of charge transport in nanocrystalline PGT was successfully explained by correlated hopping model.