Synthesis and chracterization of a Tungsten Bronze Ferroeletcric Oxide

Department of Physics, Institute of Technical Education and Research, Siksha O. Anusandhan University, Bhubaneswar 751030, India

Adv. Mater. Lett., 2012, Current Issue, 3 (3), pp 231-238

DOI: 10.5185/amlett.2012.2321

Publication Date (Web): Jun 10, 2012

Copyright © IAAM-VBRI Press

E-mail: prdas63@gmail.com

Abstract

A new ferroelectric oxide (Li₂Pb₂Gd₂W₂Ti₄Nb₄O₃₀) of the tungsten bronze structural family was synthesized using a high temperature solid-state reaction (i.e., mixed-oxide) method at 1100^oC. Room temperature structural analysis (XRD) shows the formation of a new compound in single phase. The ferroelectric phase transition temperature (much above the room temperature) was determined by the dielectric and polarization measurements. Impedance, modulus and electrical conductivity of the material exhibit a strong correlation between its micro-structure and electrical parameters. The existence of non-exponential-type of conductivity relaxation in the compound was confirmed by detailed studies of its transport properties.

Keywords

Ceramics, x-ray method, microstructure, ferroelectricity/ferroelectric material, impedance.