Analysis of Thermal Treatment of ZnO Derived by the Freeze-Drying Method

The development of advanced materials eventually leads to an expansion of new methods for the synthesis. Freeze-drying as a cryochemical method for the synthesis of high purity oxide powders with specific microstructures was presented. ZnO powders derived by this technique were characterized by X-ray powder diffraction analysis and scanning electron microscopy method. Consolidated submicronic ZnO powders were thermally treated under nonisothermal conditions at different heating rates using dilatometer. An analysis of densification and microstructural evolution was performed. The obtained results were discussed in order to establish a correlation in the triad synthesis-structure-properties.