Kinetics of mechanochemical synthesis of Me/FeS (Me = Cu, Pb, Sb) nanoparticles

摘要

The mechanochemical synthesis of Cu/FeS, Pb/FeS and Sb/FeS nanoparticles was investigated with the regard to solid-state kinetics. Experiments were performed in a planetary mill and in an eccentric vibratory mill by a high-energy milling of Cu_2S, PbS and Sb_2S_3, respectively with elemental iron under protective atmosphere. Cu, Pb and Sb nanometals were obtained due to the reducing power of iron. The reduction processes are very straightforward and fast and can be carried out at ambient temperature. Nanometals are embedded into FeS matrix forming metal/ceramics nanocomposites. XRD, SEM and magnetometry methods were used to characterize the ball-milled products. Solid-state kinetics has been evaluated based on magnetometry data.