Caracterização estrutural e térmica do óxido de Zinco produzido por Mecanoquímica

Abstract

In this work zinc oxide (ZnO) was synthesized from the mixture of zinc and stearic acid using the mechanochemistry technique. The zinc oxide was characterized by X-ray diffraction - (DRX), differential scanning calorimetry (DSC) and thermal conductivity. The structural evolution of the sample as a function of milling time was observed by refining the diffractograms by Rietveld ´s method. The Williamson-hall´s method was used to obtain the sample microdeformation and size crystallite. The ZnO phase nucleation dynamic was studied and described using the Johnson-Mehl-Avrami´s method. The results revealed that it is possible to synthesize nanostructured zinc oxide with up to 180 minutes of milling.