Abstract: Fe2O3, TiO2, CuO and ZnO powders were mixed according to the formula of (1-x)TiO2 xCuO-Fe2O3 or (1-x)TiO2 xZnO-Fe2O3 (x=0, 0.2 0.4, 0.6, 0.8, 1), and well ball-milled with H2O for 3 h to ensure homogeneity of the powdered solids, then fired at 1200℃ for 4 h. The fired samples were reduced at 500℃ with hydrogen gas. The reduced samples were subjected to recalcination at 500℃ in CO2 atmosphere. Both of fired, reduced and calcined samples were characterized by X-ray diffraction, vibrating sample magnetometry, reflected light microscopy and scanning electron microscopy. Different phases were formed after firing of Cu+2 or Zn2+ substituted Fe2TiO5. Magnetization (Bs) of the formed phases after firing are very low corresponding to diluted magnetic semiconductors (DMS) and increases with increasing the substituted cations (Cu+2 or Zn2+). The reduction of the fired samples enhanced the Bs values whereas the reducibility increases with increasing the Cu+2 or Zn2+ content. Samples show different tendency toward CO2 decomposition which is very important for environmental minimization for CO2.

Key words: Nanosized ferrite, Titanate, Reduction, Magnetic properties, Reduction-recalcination