Journal
MATERIALS LETTERS
Volume 317, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.matlet.2022.132128
Keywords
Amorphous materials; Electrical properties; Activation energy; Dielectric loss
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The AC conductivity and dielectric properties of Li2O-Bi2O3-B2O3-As2O3 glass system were investigated. The results showed that the presence of bismuth reduced the DC conductivity and increased the activation energy. The temperature and frequency dependence of the dielectric modulus exhibited a Debye-type relaxation behavior.
AC conductivity and dielectric properties of Li2O- Bi2O3-B2O3 -As2O3 glass system was prepared. The AC conductivity behavior of the present glasses has been investigated in the frequency range from100Hz to1MHz and as a function of temperature. The measured AC data are analyzed by using the Jonscher's universal power law to explain the observed dispersive behavior of the electrical conductivity. The presence of bismuth leads to a decrease in dc conductivities and an increase in the activation energies. This is likely to be due to the increase of the partial charges on the oxygen atoms and to the presence of the lone pair on the Bi atom; both of these factors hinder lithium ion motion. The temperature and frequency dependence of the dielectric modulus exhibited a debye-type relaxation behavior of these glasses.
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