Synthesis of Fine Mg1−xCaxFe2O4 Ferrite Powder Having High Heat Ability under AC Magnetic Field

Fine Mg 1 - x Ca x Fe 2 O 4 ferrite powders for local thermal coagulation therapy were synthesized by a reverse coprecipitation method. The enhancement of temperature under an AC magnetic field was improved by the partial Ca 2 + substitution. A high heat ability was obtained for the samples calcined at 300 and 800°C.