نتایج جستجو برای: cr2o3
تعداد نتایج: 857 فیلتر نتایج به سال:
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An equimolar mixtures of starting ZnO and Cr2O3 powders were mechanically activated by grinding using a planetary ball mill for various periods of time (40 to 320 minutes). Formation of nanocrystalline ZnCr2O4 as normal spinel structure at room temperature is detected in all samples after ball-milling. A detailed XRD structural analysis (lattice parameters, site occupancy, the average primary c...
Chromium oxide (α-Cr2O3) thin films were prepared using thermal annealing of chromium (Cr)films deposited on quartz substrates by direct current (DC) magnetron sputtering. The annealingprocess of the films was performed for different times of 60, 120,180 and 240 min. The influenceof annealing time on structural, morphological and optical properties of the prepared films wasinvestigated by diffe...
CO2 methanation was studied over monometallic catalyst, i.e., Ni, Fe and Co; on CeO2-Cr2O3 support. The catalysts were prepared using one-pot hydrolysis of mixed metal nitrates ammonium carbonate. Physicochemical properties the pre- post-exposure characterized by X-Ray Powder Diffraction (XRD), Hydrogen Temperature Programmed Reduction (H2-TPR), Field Emission Scanning Electron Microscope (FE-S...
A new organic-inorganic hybrid salt of cyclohexylammonium hexaisothiocyanatochromate(III) sesquihydrate, (C6H11NH3)3[Cr(NCS)6] ⋅ 3/2H2O, was synthesized at room-temperature by metathesis and ligand addition for the establishment energy-saving chemical synthesis approach. The formation this confirmed FT-IR, UV-Vis spectrophotometry, elemental microanalysis, single-crystal X-ray diffraction. TGA ...
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