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Title: Physical properties of PbO-Al<sub>2</sub>O<sub>3</sub>-B<sub>2</sub>O<sub>3</sub> glasses doped with Cr<sub>2</sub>O<sub>3</sub>
Authors: Reddy, M Rami
Reddy, M Srinivasa
Veeraiah, N
Keywords: PbO-Al<sub>2</sub>O<sub>3</sub>-B<sub>2</sub>O<sub>3</sub>
Chromium ions
Optical absorption
Dielectric properties
Issue Date: Jun-2006
Publisher: CSIR
Series/Report no.: G01R 27/26, F21K 2/04
Abstract: PbO-Al<sub>2</sub>O<sub>3</sub>-B<sub>2</sub>O<sub>3</sub> glasses containing different concentrations of Cr<sub>2</sub>O<sub>3</sub> ranging from 0 to 0.4 mol % were prepared. The dielectric properties (constant e, loss tand, <i style="">ac </i>conductivity s<sub>ac</sub> over a range of frequency and temperature and breakdown strength) of these glasses have been studied. The results of these studies were analyzed with the aid of data on optical absorption, IR spectra and thermoluminescence studies on these glasses. The analysis suggests that the chromium ions exist in Cr<sup>3+</sup> state which act as modifiers. When Cr<sub>2</sub>O<sub>3</sub> is present in higher concentrations in the glass matrix, these ions seem to exist in Cr<sup>6+</sup> state and take part in network forming positions with structural units.
Description: 446-454
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Appears in Collections:IJPAP Vol.44(06) [June 2006]

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