Synthesis of Hexaferrite Nanoparticles by Spray Pyrolysis Method

We successfully synthesized M-(BaFe12O19) and Co2Y-type (Ba2Co2Fe12O22) hexagonal ferrite nanoparticles by the technique of ultrasonic spray pyrolysis. Starting solution was a mixture of iron, barium and cobalt nitrates and deionized water with stoichiometric composition of hexaferrites. The products were collected by use of an electrostatic precipitator. Effects of temperature and gas-flow rate on occurring phase and grain morphology were investigated. The product was characterized with XRD and SEM experiments. Single phase materials of these hexaferrites with particle size of 100 nm -1 mm were obtained at lower temperature. These experiments indicate that the gas-flow rate influences on the formation temperature and that the temperature in heating zone affects grain morphology of resultant particles.