Structural,microstructural, and thermal characterizations of a chalcopyrite concentrate from the Singhbhum shear zone,India |
| |
Institution: | Department of Metal urgical and Materials Engineering, Jadavpur University, Kolkata 700032, India |
| |
Abstract: | 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 con-centrate 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 con-centrate 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. |
| |
Keywords: | chalcopyrite structural properties microstructure thermal characteristics |
本文献已被 万方数据 等数据库收录! |
| 点击此处可从《矿物冶金与材料学报》浏览原始摘要信息 |
| 点击此处可从《矿物冶金与材料学报》下载免费的PDF全文 |
|