MANUFACTURING DEVICE OF SPHERICAL SHAPE BARIUM FERRITE FOR PERPENDICULAR TYPE MAGNETIC RECORDING ELEMENT AND MANUFACTURING METHOD OF SPHERICAL SHAPE BARIUM FERRITE USING OF THE SAME

摘要

Provided are an apparatus and a method for manufacturing spherical barium ferrite nanoparticles for perpendicular type magnetic recording elements without separate post-annealing treatments. An apparatus for manufacturing spherical barium ferrite nanoparticles for perpendicular type magnetic recording elements comprises: a spray unit(110) for spraying a precursor solution; a pyrolysis unit(120) for pyrolyzing the precursor solution and crystallizing barium ferrite; a gas supply unit(130) for supplying carrier gas into the pyrolysis unit; a bypass tube(140) for bypassing some of barium ferrite powder crystallized in the pyrolysis unit; a drying unit(150) for drying barium ferrite particles and the carrier gas; a filter unit(160) for storing and keeping the barium ferrite particles; and a vacuum pump(170) for sucking the air passed through the filter unit.