Influence of modifier on dielectric and ferroelectric properties of aluminosilicate glasses

Glasses with compositions SiO2-CaO-Al2O3-TiO2-Na2O were prepared by conventional melt quench technique. The dielectric properties of these glasses with a variation in alkali content over a frequency range from 20Hz to 1MHz and temperature variation of 30–280°C have been investigated. The electric mo...

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Bibliographic Details
Published in:Journal of non-crystalline solids 2017-06, Vol.465, p.26-30
Main Authors: Kaur, Bhupinder, Singh, K., Pandey, O.P., Thakur, Samita
Format: Article
Language:English
Subjects:
Conductivity
Dielectric properties
Electric modulus
Ferroelectric
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Summary:Glasses with compositions SiO2-CaO-Al2O3-TiO2-Na2O were prepared by conventional melt quench technique. The dielectric properties of these glasses with a variation in alkali content over a frequency range from 20Hz to 1MHz and temperature variation of 30–280°C have been investigated. The electric modulus representation has been used to provide comparative analysis of the ion transport properties in these glasses. The conductivity isotherms show a transition from frequency independent dc region to dispersive region where the conductivity continuously increases with increasing frequency. The present glasses exhibit conductivity in the range of 10−5 to 10−3S/m which is higher than the alkali containing silicate glasses. Hysteresis loop observed at room temperature confirms the ferroelectric nature of glasses. •Aluminosilicate glasses are studied for dielectric and ferroelectric properties.•Dielectric constant increases with the increase in Na concentration and temperature.•The frequency dependent conductivity of the glasses follows super linear power law.
ISSN:0022-3093
1873-4812
DOI:10.1016/j.jnoncrysol.2017.03.032