Preparation of Nanocrystalline Copper and Copper Silicon Sulphide by Mechanochemical Route
The composition and properties of powders prepared by high-energy milling of copper sulphides with silicon have been studied by methods of X-ray diffractometry and surface area measurement. The combination of several methods was utilized to develop a coherent picture of the process. The overall process of mechano-chemical transformations in copper sulphide-silicon system proceeds via complicated mechanism with several overlapping steps. Phase transformations in copper sulphide phases, the formation of elemetal nanocopper with X-ray determined particle size of 23 nm and creation of ternary sulphide Cu8SiS6 with anomalous surface area values are the main products of the mechanochemical reaction.
P. Baláz et al., "Preparation of Nanocrystalline Copper and Copper Silicon Sulphide by Mechanochemical Route", Materials Science Forum, Vols. 480-481, pp. 453-456, 2005