Abstract
A dark brown liquid with magnetic properties, named “fluid-ferrite”, was synthesized directly by microwave-assisted chemical reaction. The “fluid-ferrite” is a slurry composed of ferrite nanoparticles and organic solvent. Solid ferrite particles are too small to be seen by the naked eye, so that “fluid-ferrite” looks like a liquid. It is stable for a long time without phase separation, and floats perfectly on water. In case of Ba-ferrite synthesis, the main reason for production of “fluid-ferrite” is the suppression of crystal growth of particles. On the other hand, in case of Ni-ferrite synthesis, it is the suppression of agglomeration of nano particles produced in the primary reaction.
