The optimum synthesis of high coercivity Pb–M hexaferrite powders using modifications to the traditional ceramic route

Abstract PbFe 12 O 19 hexaferrite powders with high coercivities were obtained using modifications to the traditional ceramic route. Mossbauer and X-ray diffraction measurements indicates that the M-type hexagonal phase coexist with the α-Fe 2 O 3 phase at the temperature range of 800 T T >900°C, the magnetic properties are drastically affected as a consequence of the volatility of PbO.