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Thermal behaviour of mechanochemically synthesized nanocrystalline CuS |
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| Authors: | E. Godo?í ková ,P. Balá ?,C. Real |
| Affiliation: | a Institute of Geotechnics, Slovak Academy of Sciences, Watsonova 45, 043 53 Košice, Slovakia b Institute of Material Sciences, University of Sevilla, 41092 Sevilla, Spain c Institute of Mineral and Waste Processing and Dumping Technology, Technical University Clausthal, 38678 Clausthal-Zellerfeld, Germany |
| Abstract: | Thermal behaviour of mechanochemically synthesized nanocrystalline CuS particles by high-energy milling in an industrial mill has been studied. Structure properties were characterized by X-ray powder diffraction that reveals the formation of copper sulphide CuS as well as of copper sulphate CuSO4·5H2O. Thermal properties of the as-prepared products were studied by the differential scanning calorimetry together with X-ray inspection for detection by pass products formed. The decomposition of the as-prepared sample has been studied too. Thermal stability of the anhydrous CuSO4 formed by the thermal decomposition is lower than the thermal stability of non-milled samples. The final product of the thermal decomposition is metallic copper instead of Cu2O, which is stable up to 1100 °C. Differential scanning calorimetry (DSC) analysis proved that the percentage of chalcantite in the covellite mechanochemically synthesized by high-energy milling is 48-51%. |
| Keywords: | Mechanochemistry High-energy milling Nanoparticles CuS Thermal properties |
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