Resumen

DE LA PARRA-ARCINIEGA, S.M.; ALVAREZ-MENDEZ, A; TORRES-GONZALEZ, L.C.  y  SANCHEZ, E.M.. Crystallization kinetics of a soda lime silica glass with TiO₂ addition. Rev. mex. fis. [online]. 2009, vol.55, n.1, pp.32-37. ISSN 0035-001X.

Studies conducted into Na₂O-CaO-3SiO₂ glass composition suggest that its phase transformation occurs from the surface towards the interior of the sample. In a study carried out in 1982, it was reported that no addition of nucleating agents modified the mechanism. Taking advantage of the disposition materials synthesized by nanotechnology, in this study TiO₂ in nanometer size was used with the idea that, because of its qualities, it could modify the crystallization mechanism. The glasses obtained as well as the thermally treated samples, were evaluated by the X-ray diffraction (XRD) powder method, differential thermal analysis (DTA), and by optical microscopy and high resolution transmission electron microscopy (HRTEM). Within the range of TiO₂ concentration studied (0 - 10 wt %), 10 wt % of TiO₂ considerably reduced the Na₂O-2CaO-3SiO₂ phase crystallization process. The crystallization mechanism was not modified and TiO₂ did not form compounds with the matrix components.

Palabras llave : Glass; crystallization; XRD; DTA; microscopy.