Ion transport studies in lithium phospho-molybdate glasses containing Cl- ion

Gowda, Veeranna VC and Chethana, BK and Reddy, Narayana C (2013) Ion transport studies in lithium phospho-molybdate glasses containing Cl- ion. In: Materials Science and Engineering: B, 178 (12). pp. 826-833.

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Abstract

Ion conducting glasses in xLiCl-20Li(2)O-(80-x) 0.80P(2)O(5)-0.20MoO(3)] glass system have been prepared over a wide range of composition (X = 5, 10, 15, 20 and 25 mol%). The electrical conductivity and dielectric relaxation of these glasses were analyzed using impedance spectroscopy in the frequency range of 10 Hz-10 MHz and in the temperature range of 313-353 K. D.c. activation energies extracted from Arrhenius plots using regression analysis, decreases with increasing LiCl mol%. A.c. conductivity data has been fitted to both single and double power law equation with both fixed and variable parameters. The increased conductivity in the present glass system has been correlated with the volume increasing effect and the coordination changes that occur due to structural modification resulting in the creation of non-bridging oxygens (NBO's) of the type O-Mo-O- bonds in the glass network. Dielectric relaxation mechanism in these glasses is analyzed using Kohlrausch-Williams-Watts (KWW) stretched exponential function and stretched exponent (beta) is found to be insensitive to temperature.

Item Type:	Journal Article
Publication:	Materials Science and Engineering: B
Publisher:	Elsevier Science
Additional Information:	Copyright of this article belongs to Elsevier Science.
Keywords:	Phospho-Molybdate Glasses; Electrical Conductivity; Double Power Law; Dielectric Relaxation
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	03 Sep 2013 07:02
Last Modified:	03 Sep 2013 07:02
URI:	http://eprints.iisc.ac.in/id/eprint/46967

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