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Keywords:

  • heavy-metal-oxide glasses;
  • vibrational spectroscopy;
  • electron paramagnetic resonance spectroscopy

Abstract

Heavy-metal-oxide (HMO) glasses and vitroceramics of [3Bi2O3·2PbO] and 20MnO·80[3Bi2O3·2PbO] compositions were investigated by Raman, infrared (IR) and electron paramagnetic resonance (EPR) spectroscopies. Changes in the local structure of the heavy-metal host glass induced by manganese addition, and those determined by partial crystallisation of samples are seen.

Raman and IR spectroscopies have been employed in order to obtain information on the role of Bi2O3 and PbO in the local structure of the investigated samples and on the effect of MnO on the bismuth and lead environments. EPR results have evidenced the influence of the vitreous 3Bi2O3·2PbO network on Mn2+ ions' environment and the changes in structural relaxation and magnetic interactions caused by sample crystallisation. Copyright © 2006 John Wiley & Sons, Ltd.