Structural and spectroscopic characterization of Al2−x Cr x O3 powders obtained by polymeric precursor method

Cava, Sérgio; Benincá, Renata; Tebcherani, Sérgio Mazurek; Souza, Iedo A.; Paskocimas, Carlos Alberto; Silva, Elson Longo da; Varela, José A.

Structural and spectroscopic characterization of Al2−x Cr x O3 powders obtained by polymeric precursor method

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dc.contributor.author	Cava, Sérgio
dc.contributor.author	Benincá, Renata
dc.contributor.author	Tebcherani, Sérgio Mazurek
dc.contributor.author	Souza, Iedo A.
dc.contributor.author	Paskocimas, Carlos Alberto
dc.contributor.author	Silva, Elson Longo da
dc.contributor.author	Varela, José A.
dc.date.accessioned	2021-04-14T20:09:43Z
dc.date.available	2021-04-14T20:09:43Z
dc.date.issued	2007-03-21
dc.description.resumo	Al2O3 and Al2−xCrxO3 (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 γ -Al2O3 to α-Al2O3 phase transition. The single-phase α-Al2O3 powder was obtained after heat treatment at 1050 ◦C for 2 h. The results show that the green to red color transition and ruby luminescence lines observed for the powders of Al2−xCrxO3 are related to the γ to α-Al2O3 phase transition and the temperature and time range for such transition depends on the chromium content	pt_BR
dc.identifier.citation	CAVA, Sergio; BENINCÁ, Renata; TEBCHERANI, Sergio M.; SOUZA, Iedo A.; PASKOCIMAS, Carlos A.; LONGO, Elson; VARELA, José A.. Structural and spectroscopic characterization of Al2−x Cr x O3 powders obtained by polymeric precursor method. Journal Of Sol-Gel Science And Technology, [S.L.], v. 43, n. 1, p. 131-136, 21 mar. 2007. Disponível em: https://link.springer.com/article/10.1007/s10971-007-1541-y. Acesso em: 09 mar. 2021. http://dx.doi.org/10.1007/s10971-007-1541-y.	pt_BR
dc.identifier.issn	10.1007/s10971-007-1541-y.
dc.identifier.issn	0928-0707
dc.identifier.issn	1573-4846
dc.identifier.uri	https://repositorio.ufrn.br/handle/123456789/32210
dc.language	en	pt_BR
dc.publisher	Springer	pt_BR
dc.rights	Attribution 3.0 Brazil	*
dc.rights.uri	http://creativecommons.org/licenses/by/3.0/br/	*
dc.subject	Al2O3	pt_BR
dc.subject	Al2−xCrxO3	pt_BR
dc.subject	Phase transition	pt_BR
dc.subject	Powder synthesis	pt_BR
dc.subject	Spectroscopy	pt_BR
dc.title	Structural and spectroscopic characterization of Al2−x Cr x O3 powders obtained by polymeric precursor method	pt_BR
dc.type	article	pt_BR