Electrical conductivity change with crystallization in fluorozirconate glasses

The effects of crystallization on the electrical conductivity of ZrF 4-based fluoride glasses were studied. Conductivities were measured by a.c. complex impedance method after heat treatment of samples for various time lengths at the, temperatures of near Tx (crystallization temperature). The comple...

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Bibliographic Details
Published in:Journal of non-crystalline solids 1987-12, Vol.95, p.929-936
Main Authors: Hahn, Taek-Sang, Cho, Woon-Jo, Choi, Sang-Sam, Park, Soon-Ja
Format: Article
Language:English
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Summary:The effects of crystallization on the electrical conductivity of ZrF 4-based fluoride glasses were studied. Conductivities were measured by a.c. complex impedance method after heat treatment of samples for various time lengths at the, temperatures of near Tx (crystallization temperature). The complex impedance plot of fluoride glass bulk showed a nearly perfect semicircle. However as the crystallization proceeded, the impedance arcs were depressed gradually resulting in the decrease of bulk d.c. conductivity. The depressed semicircles were thought to be consisted of three semicircles which were severally representative of glass matrix, intragrain, and grain boundary.
ISSN:0022-3093
1873-4812
DOI:10.1016/S0022-3093(87)80700-7