Dynamics of lithium ions in bismuthate glasses

Pan, A. ; Ghosh, A. (2000) Dynamics of lithium ions in bismuthate glasses The Journal of Chemical Physics, 112 (3). pp. 1503-1509. ISSN 0021-9606

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Official URL: http://link.aip.org/link/?JCPSA6/112/1503/1

Related URL: http://dx.doi.org/10.1063/1.480717


The dynamics of lithium ions in lithium bismuthate glasses have been studied in the frequency range from 10 Hz to 2 MHz and in the temperature range from 323 to 543 K. The composition dependence of the dc (direct current) conductivity has been explained in terms of the structure of bismuthate glasses. The activation energy has been analyzed in the framework of the Anderson-Stuart model. An additional energy term arising from the Madelung constant of glasses and the polarizability of the bismuth ions has been suggested to explain the discrepancy between the calculated and experimentally obtained values. The relaxation mechanism of these glasses has been explored by employing the modulus and conductivity formalisms and the microscopic parameters obtained from the analysis have been compared. Furthermore, the stretched exponential relaxation parameter and the dc conductivity have been correlated with the decoupling index.

Item Type:Article
Source:Copyright of this article belongs to American Institute of Physics.
Keywords:Lithium Compounds; Lattice Energy; Relaxation; Ionic Conductivity
ID Code:72850
Deposited On:29 Nov 2011 13:01
Last Modified:29 Nov 2011 13:01

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