Dielectric Studies on Alkali Borate Glasses Mixed with Iron Oxide

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Glass system of composition Li2O-Na2O-B2O3: Fe2O3 with replacing alkali oxides one by another have been prepared via melt quenching. Further, the samples were characterized by X-ray diffraction. XRD studies have indicated that the prepared samples were amorphous in nature. Dielectric properties (constant ε , loss tan δ, a.c. conductivity σac over a wide range of frequency and temperature) of these glasses have also been explored. The activation energy for ac conduction is estimated to be the lowest for glass F25 and the highest for glass F0. Finally the study on dielectric properties indicated that the ac conduction is predominantly ionic in nature in the samples containing high content of Li2O. Keywords: Borate glasses; dielectric properties; alkali effect

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Solid State Phenomena (Volume 207)

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69-96

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September 2013

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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