A possible formation of the nanocomposite based on silicon, cobalt and tellurium was produced by the combustion synthesis process in solution (SCS) assisted by microwave in two stages, combustion using a conventional microwave oven and purification by means of calcination at 650 ºC in a muffle furnace. The new material was developed in different oxidant-fuel relationships where it observed the effects on the evolution of the phase and morphology of the powders, the structural, morphological and thermal properties were investigated by the X-ray diffraction technique (XRD), energy dispersive X-ray spectroscopy (EDX) coupled to the scanning electron microscope (SEM) and TGA and DTG curves. Through the analysis it is possible to suggest the development of a new stable material in single phase, being isostructural to the Co8Te12O32 (ICDD-50702) of nanometric dimensions with interesting potentials due to the properties of the constituent elements.

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Gostaria de agradecer ao Professor Dr. Jorge Henrique Cabral Fernandes que me apoiou no caminho da pesquisa durante todo o processo de doutoramento, indo além dos conceitos e técnicas acadêmicas, À professora Brigitte Gay, minha coorientadora na França durante o estágio de pesquisa, que me apresentou a várias das ferramentas e métodos que foram de extrema importância para a realização dos trabalhos realizados, Aos professores, coordenadores, alunos companheiros de pesquisa e a equipe de apoio do