Evolution of the Morphology of Zinc Oxide/Silica Particles Made by Spray Combustion
نویسندگان
چکیده
Pure and mixed ZnO-SiO2 particles were prepared by flame spray pyrolysis (FSP) of zinc acetate (ZA) and either hexamethyldisiloxane (HMDSO) or SiO2-sol dispersed in either methanol or a water-in-oil emulsion. The product particles were characterized by nitrogen adsorption, infrared absorption and X-ray diffraction. The evolution of solid or hollow particle formation along the flame axis was elucidated by observing particles collected in the spray flame by thermophoretic sampling. The effects of using different silicon precursors and solvents on product particle characteristics were evaluated. The characteristics of the product particles can be controlled by the Si precursor and solvent.
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