CoAl₂O₄ powder has been  synthesised at low temperature (500⁰C) by the combustion of gel prepared from  polyvinyl alcohol (PVA), cobalt nitrates and aluminum nitrates.

Factors affecting on process synthesis of nanometer oxides CoAl₂O₄ including temperature of gel formation, molar ratio of concentration of ion metal  and the concentration of polyvinyl alcohol, temperature of calcining and heating time  on structure and sizes were investigated.

The crystalline process and the morphology of  oxides particles were considered by X-Ray diffraction (XRD), Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM). Further thermal treatment at 500-700⁰C in 3h yields the single phase CoAl₂O₄. CoAl₂O₄ powders with crystallite size 30 nm  have been prepared.

Tải file Nghiên cứu tổng hợp CoAl2O4 kích thước nanomet bằng phương pháp đốt cháy gel tại đây