Structural, microstructural, and thermal characterizations of a chalcopyrite concentrate from the Singhbhum shear zone, India
| Autor: | Shamik Chaudhuri, Saikat Kumar Kuila, Ritayan Chatterjee, Dinabandhu Ghosh |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
chemistry.chemical_classification
Materials science Sulfide Band gap Chalcopyrite Scanning electron microscope Mechanical Engineering Metallurgy Metals and Alloys Analytical chemistry Activation energy Thermogravimetry symbols.namesake chemistry Geochemistry and Petrology Mechanics of Materials Differential thermal analysis visual_art Materials Chemistry visual_art.visual_art_medium symbols Raman spectroscopy |
| Zdroj: | International Journal of Minerals, Metallurgy, and Materials. 22:225-232 |
| ISSN: | 1869-103X 1674-4799 |
| DOI: | 10.1007/s12613-015-1065-3 |
| Popis: | The structural and morphological characterizations of a chalcopyrite concentrate, collected from the Indian Copper Complex, Ghatshila, India, were carried out by X-ray diffraction, scanning electron microscopy, and energy-dispersive X-ray spectroscopy. The concentrate powder was composed mainly of free chalcopyrite and low quartz in about 3:1 weight ratio. The particle size was about 100 μm. Spectroscopic studies (FTIR, Raman, UV-visible) of the concentrate supported the XRD findings, and also revealed a marginal oxidation of the sulfide phase. The energy band gap of the sulfide was found to be 3.4 eV. Differential thermal analysis and thermogravimetry of the concentrate showed a decomposition of chalcopyrite at 658 K with an activation energy of 208 kJ·mol−1, and two successive structural changes of silica at 848 K and 1145 K. |
| Databáze: | OpenAIRE |
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