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

S. Cava; S.M. Tebcherani; I.A. SouzaS.A. PianaroC.A. PaskocimasE. LongoJ.A. Varela

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

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

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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.

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《Materials Chemistry and Physics》 |2007年第3期|394-399|共6页
作者
S. Cava; S.M. Tebcherani; I.A. SouzaS.A. PianaroC.A. PaskocimasE. LongoJ.A. Varela;
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作者单位

Laboratorio Interdisciplinar de Materiais Ceramicos, Centro Interdisciplinar de Pesquisa e Pos-Graduacao, Universidade Estadual de Ponta Grossa, Av. Gal. Carlos Cavalcanti, 4748, Campus-Uvaranas, CEP 84035-900, Ponta Grossa, PR, Brazil;

Laboratorio Interdisciplinar em Ceramica, Departamento de Fisico-Quimica, Instituto de Quimica, Universidade Estadual Paulista, R. Francisco Degni, s/n, Bairro Quitandinha, Araraquara, SP, Brazil;

Departamento de Engenharia Mecanica, Universidade Federal do Rio Grande do Norte, Campus Universitario, S/N, Lagoa Nova, CEP 59072-970, Natal, RN, Brazil;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
原文格式 PDF
正文语种英语
中图分类工程材料学;
关键词
Al2O3; Phase transition; Polymeric precursor method; Nanopowders; Micro-Raman spectroscopy; Crystallite size;

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

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