| The research was carried out by milling ZnO and a-Fe2〇3(direct synthesisreaction), basic zinc carbonate(first decomposed and then synthesized) in aqueoussolution using small iron milling balls as the supply of Fe source, to study thepossibility of reparing zinc ferrite nanoparticles via ultrasonic wave-assisted aqueousball milling technology, explore the reaction process, discuss the influence ofultrasonic to the preparation of ferrites. For comparison, the samples obtained usingother raw materials and without ultrasonic wave assistance were also prepared andstudied. The phase constitution, the particle size，the morphology and themagnetization of the as-milled products were characterized by X-ray diffraction,particle size analyzer, transmission electron microscopy and vibrating samplemagnetometer, respectively.(1)As the result, well-ordered ZnFe204nanoparticles were directly synthesizedby ultrasonic-assisted aqueous ball milling technology without subsequent calcination,direct synthesis reaction process(ZnO and a-Fe2〇3as raw materials) and firstdecomposed and then synthesized process(basic zinc carbonate as raw materials) didnot influence the reaction time, but in the beginning of the reaction, the formation rateof ZnFe2〇4along the direct synthesis reaction process was higher than that along firstdecomposed and then synthesized reaction process. Moreover, ultrasound played avital role in the milling process, it can induce and accelerate reaction.(2)At the same time, the magnetic property of ZnFe204prepared by ultrasonicwave-assisted aqueous ball milling ZnO and a-Fe203, basic zinc carbonate weremeasured at room temperature. The product had inverse spinel structure and turn toferromagnetic and the saturated magnetization were about45emu/g and56.488emu/g,which were much higher than other reported data for ZnFe2〇4powders，showingultrasonic wave-assisted ball milling method can synthesize ZnFe204with highsaturated magnetization. |
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