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Fe_2O_3,TiO_2,CuO and ZnO powders were mixed according to the formula of(1-x)TiO_2 xCuO-Fe_2O_3 or (1-x)TiO_2 xZnO-Fe_2O_3(x=0,0.2 0.4,0.6,0.8,1),and well ball-milled with H_2O 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 CO_2 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 Zn~(2+) substituted Fe_2TiO_5.Magnetization(B_s)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 Zn~(2+)). The reduction of the fired samples enhanced the B_s values whereas the reducibility increases with increasing the Cu~(+2)or Zn~(2+)content.Samples show different tendency toward CO_2 decomposition which is very important for environmental minimization for CO_2.
Fe 2 O 3, TiO 2, CuO and ZnO powders were mixed according to the formula of (1-x) TiO 2 × CuO-Fe 2 O 3 or (1-x) TiO 2 xZnO-Fe 2 O 3 (x = 0,0.2 0.4,0.6,0.8,1), and well ball-milled with H_2O for 3 h to ensure homogeneity of the powdered solids, then fired at 1200 ° C for 4 h. The fired samples were reduced at 500 ° C with hydrogen gas. The reduced samples were subjected to recalcination at 500 ° C in CO_2 In the same way that X-ray diffraction, vibrating sample magnetometry, reflected light microscopy and scanning electron microscopy. Different phases were formed after firing of Cu ~ (+2) or Zn ~ (2+) substituted Fe_2TiO_5.Magnetization (B_s) of the formed phases after firing are very low corresponding to diluted magnetic semiconductors (DMS) and increases with increasing replacement cations (Cu ~ (+2) or Zn ~ (2+) the fired samples enhanced the B_s values whereas the reducibility increases with increasing the Cu ~ (+2) or Zn ~ (2+) content.Samples show different tendency toward CO_2 decomposition which is very important for environmental minimization for CO_2.