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IJPAP Vol.46(10) [October 2008] >


Title: Thermal and electrical properties of MoO₃-Bi₂O₃-B₂O₃ glasses
Authors: Kishore, Sanjay N
Agarwal, A
Seth, V P
Sheoran, M S
Keywords: Glasses
Glass transition temperature
Transition metal ions
dc conductivity
Issue Date: Oct-2008
Publisher: CSIR
Abstract: Semiconducting oxide glasses of compositions xMoO₃.(40-x)Bi₂O₃.60B₂O₃ have been prepared by the standard melt-quenching technique over the range 0 ≤ x ≤ 10 (x is in mol%). The various properties such as glass transition temperature, density, molar volume and dc conductivity have been measured. The values of characteristic glass transition temperature (Tg) have been found from differential scanning calorimetry (DSC) traces and corresponding specific heat capacity (Cp) was also estimated. It is found that the density of these glasses decreases as MoO₃ content is increased due to lower degree of cross-bonding between molybdenum and non-bridging oxygen ions resulting in a weakening of glass network. The dc conductivity of these samples was measured in the temperature range 523-623K. In this temperature range, the dc conductivity increases from 10⁻⁹ to 10⁻⁸ S/m with increasing MoO₃ content. The values of the theoretical optical basicity of these glasses have also been determined.
Page(s): 719-721
ISSN: 0019-5596
Source:IJPAP Vol.46(10) [October 2008]

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