Microstructural Evolution of Fe2O3 and ZnFe2O4 during Sonochemical Synthesis of Zinc Ferrite

To date, the effects of ultrasonic processing on solids has been studied in detail only in metallic systems and for single crystals of alkali and transition-metal chalcogenides and halides. It has been shown that sonication may markedly raise the density of extended and point defects. The microstructural evolution of Fe203 and ZnFe2O4 during high-temperature (600-800DGC) sonochemical synthesis of zinc ferrite is studied by x-ray diffraction analysis. The results are used to develop a qualitative model for ultrasonically activated solid-state reactions AS + BS - > CS.