Electronic Resource
College Park, Md.
:
American Institute of Physics (AIP)
The Journal of Chemical Physics
112 (2000), S. 1503-1509
ISSN:
1089-7690
Source:
AIP Digital Archive
Topics:
Physics
,
Chemistry and Pharmacology
Notes:
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. © 2000 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.480717
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