Preparation of Ultrafine Hematite Particles by Microwave Heating of Ferric Salt Solutions

Nanometer-sized quasicubic and spindle a-Fe2O3 particles were prepared by microwave heating from 0.2mol·L-1Fe3+ salts solution. The obtained α-Fe2O3 particles have smaller sizes and uniform distribution by contrast with conventional heating. Inorganic ions such as H+, OH-and Na+, can obviously affect the precipitating rate of spindle α-Fe2O3 and accelerate the hydrolysis of ferric ions.