Structural and spectroscopic characterization of Al2-xCrxO3 powders obtained by polymeric precursor method
Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
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Data(s) |
20/05/2014
20/05/2014
01/07/2007
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Resumo |
Al2O3 and Al2-x Cr (x) O-3 (x = 0.01, 0.02 and 0.04) powders have been synthesized by the polymeric precursors method. A study of the structural evolution of crystalline phases corresponding to the obtained powders was accomplished through X-Ray Diffraction and UV-vis spectroscopy (reflectance spectra and CIEL* a*b* color data). The obtained results allow to identify the gamma-Al2O3 to alpha-Al2O3 phase transition. The single-phase alpha-Al2O3 powder was obtained after heat treatment at 1050 degrees C for 2 h. The results show that the green to red color transition and ruby luminescence lines observed for the powders of Al2-x Cr (x) O-3 are related to the gamma to alpha-Al2O3 phase transition and the temperature and time range for such transition depends on the chromium content. |
Formato |
131-136 |
Identificador |
http://dx.doi.org/10.1007/s10971-007-1541-y Journal of Sol-gel Science and Technology. Dordrecht: Springer, v. 43, n. 1, p. 131-136, 2007. 0928-0707 http://hdl.handle.net/11449/25446 10.1007/s10971-007-1541-y WOS:000247194300019 |
Idioma(s) |
eng |
Publicador |
Springer |
Relação |
Journal of Sol-Gel Science and Technology |
Direitos |
closedAccess |
Palavras-Chave | #Al2O3 #Al2-xCrxO3 #phase transition #powder synthesis #spectroscopy #polymeric precursor method |
Tipo |
info:eu-repo/semantics/article |