Conductivity spectra of sodium fluorozirconate glasses

Ghosh, A. ; Sural, M. (2001) Conductivity spectra of sodium fluorozirconate glasses The Journal of Chemical Physics, 114 (7). pp. 3243-3247. ISSN 0021-9606

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We have reported conductivity spectra at different temperatures for fluoride glasses of compositions 0.50ZrF4-(0.40-x)BaF2-0.10YF3-xNaF in the frequency range from 10 Hz to 2 MHz. We have analyzed the spectra using conductivity formalism and obtained the frequency exponent, concentration, and hopping frequency of charge carriers (F- ions) from the analysis. We have observed that the concentration of charge carriers is almost independent of temperature, but weakly dependent on composition, and the conductivity is essentially determined by the hopping frequency, i.e., the mobility. The frequency exponent is independent of temperature, but it shows very weak composition dependence. We have also presented a scaling of the conductivity spectra, which implies that the relaxation dynamics of charge carriers in fluoride glasses is independent of temperature and composition.

Item Type:Article
Source:Copyright of this article belongs to American Institute of Physics.
Keywords:Zirconium Compounds; Barium Compounds; Fluorine; Sodium Compounds; Ionic Conductivity; Fluoride Glasses
ID Code:72847
Deposited On:29 Nov 2011 13:01
Last Modified:29 Nov 2011 13:01

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