During the last few decades there has been a growing interest in the manufacture of transparent oxides containing specific nanocrystals in the glass-matrix, the well-known glass-ceramics. Between them, the ${\mathrm{TeO}}_2$-based glassy systems revealed as promising materials because of their interesting nonlinear, electrical and optical properties. In particular, it is recognized that tellurium-based glasses are non-linear optical materials favorable to third order nonlinear optical susceptibility. Furthermore, tellurite glass-ceramics can be used in optically operated devices because of their compatibility with the refractive index of ferroelectric compounds. In this case, it is possible to investigate the effect of the second harmonic generation from ferroelectric nanocrystals (NCs) present in the glass-matrix. The objective of the present work is to study the thermal and structural properties of tellurium-based glass-ceramics containing ferroelectric NCs, obtained by the quenching method. The physical properties were analyzed by considering the influence of different stoichiometric compositions.

$\mathbf{ACKNOWLEDGMENTS}\mathbf{:}$ The authors would like to thank to CNPq and FAPEMIG Brazilian agencies for financial support. R. C. Oliveira also thanks the Materials Science Post-Graduation Program (PPGCM), UNESP, Ilha Solteira – SP and Federal Goiano Institute, IFGoiano, Rio Verde – GO.