title: Structural, optical, electron paramagnetic, thermal and dielectric characterization of chalcopyrite.
abstract: Chalcopyrite (CuFeS2) a variety of pyrite minerals was investigated through spectroscopic techniques and thermal analysis. The morphology and elemental analysis of the chalcopyrite have been done by high resolution SEM with EDAX. The lattice parameters were from the powder diffraction data (a=5.3003±0.0089 Å, c=10.3679±0.0289 Å; the volume of the unit cell=291.266 Å(3) with space group I42d (122)). The thermal decomposition behavior of chalcopyrite was studied by means of thermogravimetric analysis at three different heating rates 10, 15 and 20 °C/min. The values of effective activation energy (Ea), pre-exponential factor (ln A) for thermal decomposition have been measured at three different heating rates by employing Kissinger, Kim-Park and Flynn-Wall methods. Dielectric studies at different temperatures have also been carried out and it was found that both dielectric constant and dielectric loss decreases with the increase of frequency.
authors: Department of Physics, Presidency College, Chennai 600 005, Tamil Nadu, India.
authors: B
authors: B
authors: Prameena
authors: Department of Physics, Presidency College, Chennai 600 005, Tamil Nadu, India. Electronic address: anbu24663@yahoo.co.in.
authors: G
authors: G
authors: Anbalagan
authors: St.Peter's University , Avadi, Chennai 600 054, Tamil Nadu, India.
authors: S
authors: S
authors: Gunasekaran
authors: St.Peter's University , Avadi, Chennai 600 054, Tamil Nadu, India.
authors: G R
authors: GR
authors: Ramkumaar
authors: Department of Geology, Presidency College, Chennai 600 005, Tamil Nadu, India.
authors: B
authors: B
authors: Gowtham
mesh_terms: D003300:Copper / Q000737:chemistry*; D004055:Differential Thermal Analysis; D004560:Electricity; D004578:Electron Spin Resonance Spectroscopy; D004583:Electrons; D008855:Microscopy, Electron, Scanning; D011208:Powders; D013052:Spectrometry, X-Ray Emission; D013056:Spectrophotometry, Ultraviolet; D017550:Spectroscopy, Fourier Transform Infrared; D013059:Spectrum Analysis, Raman; D013696:Temperature; D013818:Thermogravimetry; D014732:Vibration; D014961:X-Ray Diffraction
chemical_list: D011208:Powders; C012819:chalcopyrite; D003300:Copper
keywords: Chalcopyrite; Dielectric studies; FTIR and FT raman; Optical absorption; Thermal analysis; X-ray diffraction