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EPR and IR structural investigations on xMnO⋅(1-x)[3P2O5⋅CaO] glass system

D. TOLOMAN1,* , C. TRIPON1, L. M. GIURGIU1, I. ARDELEAN2

Affiliation

  1. National Institute for Research and Development of Isotopic and Molecular Technologies, P.O. Box 700, R 400293, Cluj-Napoca, Romania
  2. Faculty of Physics, Babes-Bolyai University, R-400084, Cluj-Napoca, Romania

Abstract

xMnO⋅(1-x)[3P2O5⋅CaO] glass system with 1 ≤ x ≤ 5 mol % was prepared and investgated in order to evidence the structural changes induced by the manganesse ions in the glass network. EPR spectra of these glasses have been recorded in the X band (9.3 GHz) at room temperature. All the investigated samples exhibit resonance signals which are characteristic to the Mn2+ ions. The shapes of the EPR spectra are also changed with the increasing of manganese ions content. IR spectra of these glasses put in evidence that main vibration bands for phosphate glasses because the MnO content is low. The intensity and frequency variations for the characteristic phosphate group vibrations: P-O-P bending and stretching, P = O stretching have been correlated with the changes of the structural units present in these glasses. Both investigation techniques inform about the structural effect of MnO on the calcium-phosphate glass matrix..

Keywords

Electron paramagnetic resonance, Infrared, Phosphate glasses.

Submitted at: Dec. 2, 2005
Accepted at: May 18, 2006

Citation

D. TOLOMAN, C. TRIPON, L. M. GIURGIU, I. ARDELEAN, EPR and IR structural investigations on xMnO⋅(1-x)[3P2O5⋅CaO] glass system, Journal of Optoelectronics and Advanced Materials Vol. 8, Iss. 3, pp. 1109-1110 (2006)