METHOD FOR PRODUCING HEXAGONAL FERRITE POWDER, HEXAGONAL FERRITE POWDER, MAGNETIC RECORDING MEDIUM, AND METHOD FOR PRODUCING MAGNETIC RECORDING MEDIUM

摘要

The method of manufacturing hexagonal ferrite powder includes preparing a hexagonal ferrite precursor by mixing an iron salt and a divalent metal salt in a water-based solution, and converting the hexagonal ferrite precursor into hexagonal ferrite within a reaction flow passage, within which a fluid flowing therein is subjected to heating and pressurizing, by continuously feeding a water-based solution containing the hexagonal ferrite precursor and gelatin to the reaction flow passage.