The process of reductive dissolution of α-Fe2O3, Ba-hexaferrite, α-FeOOH, γ-Fe2O3, γ-FeOOH, and ferrihydrite can be monitored continuously by abrasive stripping voltammetry and chronoamperometry to obtain information about homogeneity of reactivity and about the particle size of the pure phases and mixtures. Phase parameters (rate constant and charge transfer coefficient) and the geometrical fa...

Glass-ceramic (GC) materials have the formability advantages of glasses and opportunity for controlled crystallization functional ceramic phases. Here, we obtain GCs containing hard magnetic phase Sr-hexaferrite (SrFe12O19) from a borate glass. Ten compositions in B2O3-Fe2O3-SrO system were explored, varying B2O3 Sr/Fe ratio. Compositions forming glass on quenching, according to X-ray diffracti...

We report enhanced permanent magnet performance for multi-cation–substituted M-type Sr-hexaferrites (SrM) prepared using conventional ceramic processes. The final cation composition, Sr0.4Ca0.3La0.3Fe10.2Co0.1Mn0.1Si0.05Mg0.05O19, could be derived through stepwise and systematic composition designs, processing, characterization. hexaferrites sample sintered in the temperature range of 1200–1220...