A simple synthesis route for high quality BaFe12O19 magnets

The present investigation reports the detailed analysis of the influence of B₂O₃-doping on magnetic and structural properties of hexagonal barium ferrites (BaFe₁₂O₁₉) synthesized via conventional ceramic technique. The results show that crystalline structure of barium ferrite is improved with small amounts of B₂O₃ between 0.1 and 1.0 wt%. Single phase particles has been obtained by 1.0 wt% B₂O₃-doping with calcination at temperatures as low as 850 °C and a range of boron concentration and calcination temperature has been extended in order to find the best synthesis conditions. Optimal properties have been achieved by 0.2 wt% of B₂O₃-doping and calcination at 1000 °C. The remanence and the saturation magnetizations increase considerably by about 40% in magnitude with B₂O₃.