Eur. Phys. J. Appl. Phys. 51, 30901 (2010)
https://doi.org/10.1051/epjap/2010120

Structural studies of copper doped 2TeO₂–PbO–Ag₂O glass by FT-IR and Raman spectroscopies

¹ Faculty of Physics, Babes-Bolyai University, 400084 Cluj-Napoca, Romania
² Institut de Ciencia de Materials de Barcelona, CSIC, Esfera UAB, 08193 Bellaterra, Spain

Corresponding author: rluca@phys.ubbcluj.ro

Received: 1 February 2010
Revised: 18 May 2010
Accepted: 23 June 2010
Published online: 2 September 2010

Abstract

The FT-IR absorption and Raman scattering were used in order to obtain information concerning the short range order in xCuO·(100-x)[ 2TeO₂·PbO·0.2Ag₂O] (0 ≤ x ≤ 5 mol%) glasses. Moreover, the changes in tellurium atoms coordination that occurs with copper oxide addition were followed. Both techniques reveal that tellurium is disposed in the network structure in trigonal bipyramids (TeO₄), trigonal pyramids (TeO₃) along with TeO₃₊₁ polyhedra units. Increasing the CuO content in the glasses changes the coordination of tellurium atoms from 4 to 3 through the so-called 3+1 intermediate units, simultaneously with the increase of the non-bridging oxygen (NBOs) ions amount causing a depolymerization process in the glass structure.