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Title: dc Conductivity and dielectric properties of V₂O₅-Bi₂O₃-ZnO glass
Authors: Shukla, D K
Mollah, S
Keywords: Glass;dc Conductivity;Polaronic hopping models;Dielectric properties;V₂O₅-Bi₂O₃-ZnO;Semiconducting oxide glass
Issue Date: Jan-2007
Publisher: CSIR
IPC Code: G01R
Abstract: Semiconducting oxide glass with composition 40 V₂O₅-40Bi₂O₃-20ZnO is prepared by rapid quenching method. The glassy phase is confirmed from X-ray diffraction (XRD) pattern which shows a broad hump around 2 = 30o. The dc conductivity of the glass has been measured in the temperature range 300 – 600 K and compared with that of other vanadium and copper based zinc oxide containing glasses. The dc conductivity is due to non-adiabatic small polaron hopping conduction which is confirmed from the fitting of the conductivity data with different polaronic hopping models. The frequency (75 kHz - 30 MHz) dependent dielectric constant of the glass decreases first and then increases with the increase of frequency at room temperature. The anomaly in frequency dependent dielectric constant at ~ 5 MHz may be due to the displacement and/or orientational motion of BiO₃ and BiO₆ structural units present in the glass.
Page(s): 52-56
ISSN: 0019-5596
Appears in Collections:IJPAP Vol.45(01) [January 2007]

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