The role of iron ions on the structure and certain physical properties of PbO-As2O3 glasses

Various studies have been carried out viz optical absorption, infrared spectra, magnetic susceptibility, dielectric parameters (dielectric constant, loss and a.c. conductivity over a range of frequency and temperature; and breakdown strength) and differential thermal analysis of PbO-As2O3 glasses containing 0-1 mol% of Fe2O3. An anomaly has been observed in all the properties of these glasses when Fe2O3 concentration is about 0.25 mol%. The reasons for such anomaly have been identified and found that PbO-As2O3 glasses are more stable when Fe2O3 concentration is about 0.25 mol%. (C) 2002 Published by Elsevier Science Ltd.