Study the effect of annealing on the some physical properties of ZnO and NiO nanostructures

Abstract

The annealing process was carried out for the Nano composed oxides (zinc and nickel) at different temperatures (200 ° C, 500 ° C, 700 ° C) and for a specific time of one hour for each temperature change in order to get rid of the internal pressures and the change in their physical and chemical properties and study the structural properties. The optical and surface diffraction results of the nanocrystalline oxides after each temperature change, as the results of the X-ray diffraction of zinc oxide showed that it has a polycrystalline structure and of the hexagonal type and the X-ray diffraction of nickel oxide showed that it has a polycrystalline structure of the cubic type. After the annealing process using Brake law and calculating the average Crystallite size by Debye Shearer method, it was observed that there was an increase in the average crystal size after each temperature change and the results of FTIR showed the emergence of the chemical Zn-O band of zinc oxide, as most Studies indicate the emergence of a (Zn-O) band within the (cm-1) spectral range (400-700) and the emergence of a (Ni-O) chemical bond of nickel oxide, where the peak intensity of this bond decreases due to the hot change. Get up in temperatures. The results of (FESEM) images showed that it is within the nanoscale and that the grain size increases after each temperature change process..