Electrical conductivity and dielectric constant of magnesium phosphate glasses

ac complex-impedance measurements were carried out on the prepared MgO-P 2O 5 glasses in the frequency range 0.1–100 kHz and temperature range 293–573 K. The low frequency Cole-Cole dependence of the Z″ ( Z′) impedance and the linear dependence of ϵ″ (ϵ′) dielectric constant revealed that the conduc...

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Bibliographic Details
Published in:Materials letters 1995, Vol.22 (5), p.289-296
Main Author: Higazy, A.A.
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Condensed matter: structure, mechanical and thermal properties
Dielectric properties of solids and liquids
Dielectrics, piezoelectrics, and ferroelectrics and their properties
Diffusion in solids
Exact sciences and technology
Permittivity (dielectric function)
Physics
Self-diffusion and ionic conduction in nonmetals
Transport properties of condensed matter (nonelectronic)
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Summary:ac complex-impedance measurements were carried out on the prepared MgO-P 2O 5 glasses in the frequency range 0.1–100 kHz and temperature range 293–573 K. The low frequency Cole-Cole dependence of the Z″ ( Z′) impedance and the linear dependence of ϵ″ (ϵ′) dielectric constant revealed that the conduction mechanism in the present glass system is mainly ionic. The dc electrical conductivity, the activation energy and the relaxation energy are found to be sensitive to the glass composition. It is found from the obtained data that the MgO-P 2O 5 glass system can be divided into two compositional regions.
ISSN:0167-577X
1873-4979
DOI:10.1016/0167-577X(94)00254-1