Synthesis and chracterization of a Tungsten Bronze Ferroeletcric Oxide

B. N. Parida, Piyush R. Das*, R. Padhee and R. N. P. Choudhary

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

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 1100oC. 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.

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