Eur. Phys. J. Plus (2015) 130: 245
https://doi.org/10.1140/epjp/i2015-15245-7

Regular Article

Partial substitution effects on the physical properties of Ba_0.67Nd_0.22Ti_(1-x)Sn_xO₃

¹ Laboratory of Condensed Matter and Nanosciences, Faculty of Sciences of Monastir, Monastir, Tunisia
² Laboratory of Physics of Materials and Nanomaterials Applied to the Environment, Faculty of Sciences of Gabes, Gabes, Tunisia
³ High School of Sciences and Technology, University of Sousse, Sousse, Tunisia
⁴ I3N and Physics Department, University of Aveiro, 3810-193, Aveiro, Portugal

^* e-mail: rahmounihedi@yahoo.fr

Received: 8 September 2015
Accepted: 5 November 2015
Published online: 9 December 2015

Abstract

Perovskite-ceramics Ba_0.67Nd_0.22Ti_(1-x)Sn_xO₃ (BNTSn_x) with are synthesized by the conventional solid-state reaction. The diffraction peaks are sharp, indicating well crystallized phases. Ritveld analyses of XRD data show that the samples display a clean single phase without traces of secondary phases. The Scanning electron microscopy micrographs show that more dense structure is formed when increasing tin content and all samples show a similar grain habit with a parallelepipedic structure. The analysis of the dielectric properties permits to suggest the presence of diffuse phase transition in the system. The temperature dependence of the permittivity is well described by the modified Curie-Weiss law. Also, a metal-semiconductor transition is observed at around K and 145 K, respectively for x = 0 and 0.05. For x = 0.1, only a semiconductor behavior is observed and is lower than 80 K. In addition, the frequency dependence of conductance is found to obey to the Jonscher universal power law.