Preparation, Characterization and Magnetic Property of Coprecipitated Barium Hexaferrite Powders

Abstract

A modified route for synthesizing barium hexaferrite (BaO.6Fe2O3) through ammonium carbonate using metal chlorides is reported. The coprecipitations were studied in the range of pH 7.2–8, Fe/Ba ratio 8.55–11.5, and dilutions of 0.005M–0.5M. The average particle size of these coprecipitates ranged from 20 Å to 170 Å. Ferritization studies have been carried out between 850° and 1150°C. The optimum specific magnetic moments and coercive fields were in the range of 49–53 emu/gm and 3.45–3.55 K Oe respectively.