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FT-IR and Raman spectroscopic studies on MnO-B2O3- PbO-Ag2O glasses

I. ARDELEAN1,* , V. TIMAR1

Affiliation

  1. Faculty of Physics, Babes-Bolyai University, 400084, Cluj-Napoca, Romania

Abstract

Glasses from xMnO·(100-x)[3B2O3·0.7PbO·0.3Ag2O] system, with 0 ≤ x ≤ 20 mol%, were prepared and investigated by means of two complementary spectroscopic methods: FT-IR absorption and Raman scattering. Both, FT-IR and Raman spectroscopic techniques have revealed changes in the local structure of the glasses when the composition modifies. The manganese ions modifier role is pointed out by the shape of the recorded spectra, changed at increasing of MnO content. The FT-IR data indicate the presence in the glasses of the BO3 and BO4 structural units, the network structure being mainly build by: di-, tri-, tetra-, penta- and ortho-borate groups. The characteristic bands of the different structural groups evidenced in these glasses were identified and quantitatively analyzed by the increasing of MnO content. The MnO content dependence of NBO4/NBO3 ratio was studied. Raman data correlate well with the FT-IR results and complete them. By Raman scatering was detecting new structural groups as pyro-, ditri- and dipenta-borate, indicating structural changes in the short-range order of our glasses at the MnO addition..

Keywords

FT-IR, Raman, Manganese ions, Local structure.

Submitted at: Feb. 25, 2007
Accepted at: Feb. 18, 2008

Citation

I. ARDELEAN, V. TIMAR, FT-IR and Raman spectroscopic studies on MnO-B2O3- PbO-Ag2O glasses, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 2, pp. 246-250 (2008)