Characterization of a mechanochemically activated titanium-hematite mixture: Mössbauer spectroscopy study

A.A. CRISTÓBAL; C.P RAMOS; P.M. BOTTA; ESTEBAN F. AGLIETTI; C. SARAGOVI; JOSÉ M. PORTO LÓPEZ

Buenos Aires

Congreso; FCM08: At the frontiers of condensed matter IV; 2008

In behalf of a better comprehension of the thermal, physical-chemical, magnetic and hyperfine behavior, we have considered a titanium and hematite mixture, with molar ratio Ti:Fe2O3 of 1:2, mechanochemically activated during different activation times. We have studied the development of new phases by X-ray diffraction, scanning electron microscopy and Mössbauer spectroscopy. The evolution from the starting materials affected by different milling times and subsequent annealing shows that Ti reduces the Fe ions in the Fe2O3 lattice, partly to Fe2+ and partly to metallic Fe. times. We have studied the development of new phases by X-ray diffraction, scanning electron microscopy and Mössbauer spectroscopy. The evolution from the starting materials affected by different milling times and subsequent annealing shows that Ti reduces the Fe ions in the Fe2O3 lattice, partly to Fe2+ and partly to metallic Fe. 2O3 of 1:2, mechanochemically activated during different activation times. We have studied the development of new phases by X-ray diffraction, scanning electron microscopy and Mössbauer spectroscopy. The evolution from the starting materials affected by different milling times and subsequent annealing shows that Ti reduces the Fe ions in the Fe2O3 lattice, partly to Fe2+ and partly to metallic Fe.2O3 lattice, partly to Fe2+ and partly to metallic Fe.