Specific signatures of α-alumina powders prepared by calcination of boehmite or gibbsite
| dc.contributor.author | A. Boumaza | |
| dc.date.accessioned | 2024-02-16T15:50:11Z | |
| dc.date.available | 2024-02-16T15:50:11Z | |
| dc.date.issued | 2010-04-09 | |
| dc.description.abstract | The specific signatures of α-Al2O3 powders by a combination of X-ray diffraction (Rietveld analysis), scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, thermal analysis (TG–DTA) and cathodoluminescence (CL) were investigated. Thus, α-alumina was prepared by calcination of boehmite or gibbsite at 1573 K for 24 h. The size of α-alumina crystallites obtained using boehmite precursor was smaller than that obtained using gibbsite precursor. The difference in oxygen vacancies (F+-centers) amount between α-Al2O3 powder obtained by calcination of gibbsite and boehmite was confirmed by CL spectra. Furthermore, the Ti3+ emission at 1.71 eV is absent in α-Al2O3 powder obtained by calcination of gibbsite. CL has been demonstrated as a possible method for differentiation between the various α-alumina powders. | |
| dc.identifier.uri | http://dspace.univ-khenchela.dz:4000/handle/123456789/1304 | |
| dc.language.iso | en | |
| dc.title | Specific signatures of α-alumina powders prepared by calcination of boehmite or gibbsite | |
| dc.title.alternative | Specific signatures of α-alumina powders prepared by calcination of boehmite or gibbsite | |
| dc.type | Article |
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