INVESTIGADORES
BOTTA pablo Martin
artículos
Título:
Characterization of a mechanochemically activated titanium-hematite mixture: Mossbauer spectroscopy study
Autor/es:
A.A. CRISTÓBAL; C.P RAMOS; P.M. BOTTA; ESTEBAN F. AGLIETTI; C. SARAGOVI; JOSÉ M. PORTO LÓPEZ
Revista:
PHYSICA B - CONDENSED MATTER
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Año: 2009 vol. 404 p. 2751 - 2753
ISSN:
0921-4526
Resumen:
Mechanochemicalprocessesinvolvingreactionsbetweenmetalsandcrystallineoxidesareofinterest becauseoftheirpotentialtechnologicalapplicationsinstructural,magneticorelectricmaterials.In additiontheycancontributetotheunderstandingofthenaturaloccurringprocessesthatleadtothe formationofmineralsandsoils.Thecontrolledstudiesofhowthedistributionofcationsinthe titanomagnetitestakesplacecanhelptowardbuildingamodelforthenatureoftheirmagnetismand, since theyaretheprimarycarriersofrockandsoilmagnetism,arethereforeintensivelyinvestigatedin manyexperimentalandtheoreticalstudies. In behalfofabettercomprehensionofthethermal,physicalchemical,magneticandhyperfine behavior,wehaveconsideredatitaniumandhematitemixture,withmolarratioTi:Fe2O3 of 1:2, mechanochemicallyactivatedduringdifferentactivationtimes.Wehavestudiedthedevelopmentof new phasesbyX-raydiffraction,scanningelectronmicroscopyandMo¨ ssbauer spectroscopy.The evolution fromthestartingmaterialsaffectedbydifferentmillingtimesandsubsequentannealing shows thatTireducestheFeionsintheFe2O3 lattice,partlytoFe2+ and partlytometallicFe. 2O3 of 1:2, mechanochemicallyactivatedduringdifferentactivationtimes.Wehavestudiedthedevelopmentof new phasesbyX-raydiffraction,scanningelectronmicroscopyandMo¨ ssbauer spectroscopy.The evolution fromthestartingmaterialsaffectedbydifferentmillingtimesandsubsequentannealing shows thatTireducestheFeionsintheFe2O3 lattice,partlytoFe2+ and partlytometallicFe.
