Structural characterization of phase transition of Al2O3 nanopowders obtained by polymeric precursor method

Nanocrystalline Al2O3powders have been synthesized by the polymeric precursor method. A study of the evolution of crystalline phases of obtained powders was accomplished through X-ray diffraction, micro-Raman spectroscopy and refinement of the structures through the Rietveld method. The results obta...

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Principais autores: Cava, Sérgio, Tebcherani, Sérgio Mazurek, Souza, Iedo A., Pianaro, Sidnei Antônio, Paskocimas, Carlos Alberto, Silva, Elson Longo da, Varela, José A.
Formato: article
Idioma:English
Publicado em: Elsevier
Assuntos:
Al2O3
Phase transition
Polymeric precursor method
Nanopowders
Micro-Raman spectroscopy
Crystallite size
Endereço do item:https://repositorio.ufrn.br/handle/123456789/32253
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spelling ri-123456789-322532022-01-12T15:15:33Z Structural characterization of phase transition of Al2O3 nanopowders obtained by polymeric precursor method Cava, Sérgio Tebcherani, Sérgio Mazurek Souza, Iedo A. Pianaro, Sidnei Antônio Paskocimas, Carlos Alberto Silva, Elson Longo da Varela, José A. Al2O3 Phase transition Polymeric precursor method Nanopowders Micro-Raman spectroscopy Crystallite size Nanocrystalline Al2O3powders have been synthesized by the polymeric precursor method. A study of the evolution of crystalline phases of obtained powders was accomplished through X-ray diffraction, micro-Raman spectroscopy and refinement of the structures through the Rietveld method. The results obtained allow the identification of three steps on the -Al2O3 to -Al2O3 phase transition. The single-phase -Al2O3 powder was obtained after heat-treatment at 1050 ◦ C for 2 h. A study of the morphology of the particles was accomplished through measures of crystallite size, specific surface area and transmission electronic microscopy. The particle size is closely related to -Al2O3 to -Al2O3 phase transition 2021-04-16T17:40:27Z 2021-04-16T17:40:27Z 2007-06-15 article CAVA, S.; TEBCHERANI, S.M.; SOUZA, I.A.; PIANARO, S.A.; PASKOCIMAS, C.A.; LONGO, E.; VARELA, J.A.. Structural characterization of phase transition of Al2O3 nanopowders obtained by polymeric precursor method. Materials Chemistry And Physics, [S.L.], v. 103, n. 2-3, p. 394-399, jun. 2007. Disponível em: https://www.sciencedirect.com/science/article/abs/pii/S0254058407000995?via%3Dihub. Acesso em: 12 mar. 2021. http://dx.doi.org/10.1016/j.matchemphys.2007.02.046. 0254-0584 10.1016/j.matchemphys.2007.02.046 https://repositorio.ufrn.br/handle/123456789/32253 en Attribution 3.0 Brazil http://creativecommons.org/licenses/by/3.0/br/ application/pdf Elsevier
institution Repositório Institucional
collection RI - UFRN
language English
topic Al2O3
Phase transition
Polymeric precursor method
Nanopowders
Micro-Raman spectroscopy
Crystallite size
spellingShingle Al2O3
Phase transition
Polymeric precursor method
Nanopowders
Micro-Raman spectroscopy
Crystallite size
Cava, Sérgio
Tebcherani, Sérgio Mazurek
Souza, Iedo A.
Pianaro, Sidnei Antônio
Paskocimas, Carlos Alberto
Silva, Elson Longo da
Varela, José A.
Structural characterization of phase transition of Al2O3 nanopowders obtained by polymeric precursor method
description Nanocrystalline Al2O3powders have been synthesized by the polymeric precursor method. A study of the evolution of crystalline phases of obtained powders was accomplished through X-ray diffraction, micro-Raman spectroscopy and refinement of the structures through the Rietveld method. The results obtained allow the identification of three steps on the -Al2O3 to -Al2O3 phase transition. The single-phase -Al2O3 powder was obtained after heat-treatment at 1050 ◦ C for 2 h. A study of the morphology of the particles was accomplished through measures of crystallite size, specific surface area and transmission electronic microscopy. The particle size is closely related to -Al2O3 to -Al2O3 phase transition
format article
author Cava, Sérgio
Tebcherani, Sérgio Mazurek
Souza, Iedo A.
Pianaro, Sidnei Antônio
Paskocimas, Carlos Alberto
Silva, Elson Longo da
Varela, José A.
author_facet Cava, Sérgio
Tebcherani, Sérgio Mazurek
Souza, Iedo A.
Pianaro, Sidnei Antônio
Paskocimas, Carlos Alberto
Silva, Elson Longo da
Varela, José A.
author_sort Cava, Sérgio
title Structural characterization of phase transition of Al2O3 nanopowders obtained by polymeric precursor method
title_short Structural characterization of phase transition of Al2O3 nanopowders obtained by polymeric precursor method
title_full Structural characterization of phase transition of Al2O3 nanopowders obtained by polymeric precursor method
title_fullStr Structural characterization of phase transition of Al2O3 nanopowders obtained by polymeric precursor method
title_full_unstemmed Structural characterization of phase transition of Al2O3 nanopowders obtained by polymeric precursor method
title_sort structural characterization of phase transition of al2o3 nanopowders obtained by polymeric precursor method
publisher Elsevier
publishDate 2021
url https://repositorio.ufrn.br/handle/123456789/32253
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