Author/Authors :
Lima، نويسنده , , S.M. and Falco، نويسنده , , W.F. and Bannwart، نويسنده , , E.S. and Andrade، نويسنده , , L.H.C. and de Oliveira، نويسنده , , R.C. and Moraes، نويسنده , , J.C.S. and Yukimitu، نويسنده , , K. and Araْjo، نويسنده , , E.B. and Falcمo، نويسنده , , E.A. and Steimacher، نويسنده , , A. and Astrath، نويسنده , , N.G.C. and Bento، نويسنده , , A.C. and Medina، نويسنده , , A.N. and Baesso، نويسنده , , M.L.، نويسنده ,
Abstract :
In this work the thermal lens, thermal relaxation calorimetry and interferometric methods are applied to investigate the thermo-optical properties of tellurite glasses (in mol%: 80TeO2–20 Li2O(TeLi), 80TeO2–15Li2O–5TiO2 (TeLiTi-5) and 80TeO2–10Li2O–10TiO2 (TeLiTi-10)). Thermal diffusivity, thermal conductivity, specific heat and the temperature coefficients of refractive index, optical path length, thermal expansion and electronic polarizability were determined. The use of three independent methods was useful for a complete characterization of the studied tellurite glasses. In addition, our results showed that the thermal expansion coefficient and the temperature coefficient of the optical path length (dS/dT) were significantly modified with the introduction of titanium, which may be relevant for the application of these glasses in the photonic area.
