Preparation and Characterization of Fe/Al_2O_3 Nanocomposites

摘要

Fe_2O_3/Al_2O_3 nanocomposites prepared by using the sol-gel technique were reduced in H_2 atmosphere at different temperatures, and the corresponding Fe/Al_2O_3 nanocomposites were obtained after the reduction of Fe_2O_3/Al_2O_3 nanocomposites at 1173 K. The structures and properties of the specimens were studied by X-ray diffraction( XRD), Moessbauer spectroscopy( MS) , and vibrating sample magnetometry( VSM). The results show that the reduction temperature has a significant influence on the structure, the grain size, and the magnetic properties of the specimens.