Modeling the ac conductivity dispersion of mixed alkali germanate glasses

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The ac conductivity and permittivity of mixed alkali, (Li2O)x(Na2O)1-x: 9GeO2, glasses are reported. An analysis of the scaling properties is performed which indicates the ac conductivity and permittivity at different temperatures but fixed glass composition can be collapsed to a master curve. However, these master curves exhibit systematic changes with cation mixing which include a decrease in the conductivity dispersion exponent and substantial increase of dielectric loss at low frequencies. A simple model, based upon the dynamic structure model of Ingram and coworkers, is introduced in an attempt to understand these changes. A key feature of the model is the assumption that the cation's local conduction space is modified by mixing of the two cation species.

Original languageEnglish
Pages (from-to)18-29
Number of pages12
JournalJournal of Non-Crystalline Solids
Volume288
Issue number1-3
DOIs
StatePublished - Aug 2001

Fingerprint

Alkalies
Cations
alkalies
Positive ions
cations
Glass
conductivity
glass
Permittivity
permittivity
curves
Dielectric losses
Model structures
dielectric loss
exponents
low frequencies
scaling
conduction
Chemical analysis
Temperature

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Electronic, Optical and Magnetic Materials

Cite this

Modeling the ac conductivity dispersion of mixed alkali germanate glasses. / Zhang, J.; Sidebottom, David L.

In: Journal of Non-Crystalline Solids, Vol. 288, No. 1-3, 08.2001, p. 18-29.

Research output: Contribution to journalArticle

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