Synthesis of FeS₂ and FeS nanoparticles by high-energy mechanical milling and mechanochemical processing

High-energy mechanical milling of the FeS₂ pyrite led to the formation of sub-micron particles with nano-scaled grains. FeS₂ nanoparticles were obtained, when NaCl was used as the dispersion medium. FeS₂ pyrite and FeS troilite phases could be formed after high-energy mechanical milling. The formation of FeS₂ pyrite required a long milling time. The resultant powders consisted of nano-scaled particles. The use of the solid dispersion medium (NaCl) can promote dispersion of nanoparticles. This work has shown that iron sulfide nanoparticles can be synthesized by mechanochemcial process with a solid dispersion medium.