Physical, thermal and structural properties of Calcium Borotellurite glass system

In this work the glass forming ability in Calcium Borotellurite (CBTx) glass system was studied. Six glass samples were prepared by melt-quenching technique and the obtained samples are transparent, lightly yellowish, with no visible crystallites. The structural studies were carried out by using XRD...

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Bibliographic Details
Published in:Materials chemistry and physics 2016-08, Vol.178, p.133-138
Main Authors: Paz, E.C., Dias, J.D.M., Melo, G.H.A., Lodi, T.A., Carvalho, J.O., Façanha Filho, P.F., Barboza, M.J., Pedrochi, F., Steimacher, A.
Format: Article
Language:English
Subjects:
Calcium
Crystallites
Doping
Fourier transform infrared spectroscopy (FTIR)
Glass
Glass formation
Glasses
Optical materials
Raman spectroscopy and scattering
Rare earth metals
Thermal properties
Thermal stability
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Summary:In this work the glass forming ability in Calcium Borotellurite (CBTx) glass system was studied. Six glass samples were prepared by melt-quenching technique and the obtained samples are transparent, lightly yellowish, with no visible crystallites. The structural studies were carried out by using XRD, FTIR, Raman Spectra, density measurements, and the thermal analysis by using DTA and specific heat. The results are discussed in terms of tellurium oxide content and their changes in structural and thermal properties of glass samples. The addition of TeO2 increased the density and thermal stability values and decreased glass transition temperature (Tg). Raman and FTIR spectroscopies indicated that the network structure of CBTx glasses is formed by BO3, BO4, TeO3, TeO3+1 and TeO4 units. CBTx system showed good glass formation ability and good thermal stability, which make CBTx glasses suitable for manufacturing process and a candidate for rare-earth doping for several optical applications. •Glass forming ability on Calcium Borotellurite system was studied.•The glass structure was investigated by XRD, Raman and FTIR.•The glass network structure of the CBTx glasses is formed by BO3, BO4, TeO3, TeO3+1 and TeO4 units.•The density and thermal stability of the CBTx glass decreases with TeO2 while the Cp and the Tg decreases.•The obtained CBTx glasses are suitable for manufacturing process and rare-earth doping for several optical applications.
ISSN:0254-0584
1879-3312
DOI:10.1016/j.matchemphys.2016.04.080