One Step Rapid Synthesis of Nano-Crystalline ZnO by Microwave-Assisted ‎Solution Combustion Method

In this study nano-crystalline ZnO ‎particles were synthesized by ‎microwave-assisted solution ‎combustion method. Zinc nitrate ‎and urea were used as oxidizer ‎and fuel, respectively. The effect of ‎fuel to oxidizer (F/O) ratio on ZnO ‎powder properties was ‎investigated by using different ‎urea/nitrate ratios. X-ray ‎diffractometer, scanning electron ‎microscopy and fourier transform ‎infra-red were used in powders ‎characterization. The results ‎showed that under microwave ‎radiation the pure ZnO phase was ‎formed after combustion reaction ‎with different F/O ratios. The ‎crystallite size was calculated in ‎the range of 28-32 nm using ‎Scherrerʹs equation. The result has ‎shown that F/O ratio variation ‎influenced the particle morphology ‎from pyramid structure to partially ‎sintered spherical.‎