Interface interaction and inter-osmosis effect of Fe_x （SiO₂）_1-x nanocomposite materials on magnetic properties

摘要

Fe_x（SiC₂ ）_{1 - x} nanocomposites prepared by using mechanical alloying method were reported. The mi-crostructure character and magnetic properties of Fex （SiO₂） 1 - x nanocomposite samples with different Fe content and different ball milling time were studied by using X-ray diffraction （XRD）, transmission electron microscopy （TEM）, Mossbauer spectroscopy, and Faraday magnetic balance in a wide temperature range. The results indicate that the mi-crostructure and magnetic properties are closely related to ball milling time and Fe content. When Fe content is less than 20 wt% , the sample after 80-h ball milling has very complex microstructure. Small α-Fe grains and Fe cluster are implanted in SiO2 matrix. And there are not only isolated α-Fe granular and Fe cluster, but also nanometer scaled sandwich network-like structure. Fex （SiO₂） 1 - x nanocomposite samples display a rich variety of physical and chemical properties as a result of their unique nanostructure, strong interface interaction and inter