Pastor, M and Prasad, A and Biswas, K and Pandey, A C and Manna, Indranil (2012) Microstructural and impedance study of nanocrystalline lanthana-doped scandia-stabilized zirconia. Journal of Nanoparticle Research, 14 (8). Article No-1031. ISSN 1388-0764

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Abstract

Lanthana-doped (0-4 mol%) scandiastabilized zirconia was synthesized by chemical co-precipitation from an aqueous solution of appropriate salts. Microstructural characterization, phase identification, and conductivities were determined by X-ray diffraction (XRD), scanning (SEM), transmission electron microscopy (TEM), and complex impedance analysis. The crystallite size of the as-precipitated compound, determined from XRD peak broadening and verified by TEM, varied between 20 and 30 nm. SEM studies revealed that the sintered microstructure was dense and uniform. Complex impedance analysis allowed determination of frequency and temperature dependence of both alternating (AC) and direct current (DC) conductivities of the material. The results indicated a gradual decrease in impedance of both grain and grain boundary with increase in lanthana doping. Temperature dependence studies of both AC and DC conductivities shows that the maximum conductivity is obtained in 3 mol% lanthana-doped compound, which incidentally records the highest density, too.

Item Type: Article
Uncontrolled Keywords: XRD; SEM; Impedance spectroscopy; Conductivity
Subjects: Engineering Materials
Divisions: Director´┐Żs Secretariat
Depositing User: Bidhan Chaudhuri
Date Deposited: 01 Nov 2012 08:32
Last Modified: 06 Nov 2012 12:46
URI: http://cgcri.csircentral.net/id/eprint/1809

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