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Structural investigation of MnO-P2O5-TeO2 glasses by FTIR spectroscopy

C. HOREA1,2, M. TODERAS1,2, I. ARDELEAN1,*

Affiliation

  1. Faculty of Physics, Babes-Bolyai University, 400084 Cluj-Napoca, Romania
  2. Department of Physics, University of Oradea, 410087 Oradea, Romania

Abstract

Glasses of the xMnO·(100-x)[2P2O5·TeO2] system, with 0 ≤ x ≤ 50 mol %, were prepared in the same conditions and investigated by FTIR spectroscopy. IR spectra of these glasses were analyzed in order to identify the contribution of each component to the local structure that determined the physical properties of these glasses. The 2P2O5·TeO2 glass matrix is formed from two glass formers: P2O5 as a classical one and TeO2 as a non-conventional one, which determined the basic structure of the studied glasses. The results have shown that phosphorous and tellurium ions take part in the network of studied glasses as PO4, TeO4 trigonal bipyramid and TeO3 trigonal pyramid units. At higher manganese ion content, the P=O bonds break, the P–O–P bonds can probably be replaced by P–O–Mn bonds. The bands corresponding to the IR absorption of MnO are not directly evidenced. The phosphate chain length decreases in the glasses with high MnO content due to the depolymerization of the phosphate structure, leading to the increase of the number of short phosphate chain units or rings..

Keywords

Tellurite-phosphate glasses, Structure by FT-IR, MnO.

Submitted at: Nov. 15, 2006
Accepted at: March 15, 2007

Citation

C. HOREA, M. TODERAS, I. ARDELEAN, Structural investigation of MnO-P2O5-TeO2 glasses by FTIR spectroscopy, Journal of Optoelectronics and Advanced Materials Vol. 9, Iss. 3, pp. 708-710 (2007)