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Please use this identifier to cite or link to this item: http://repositorio.ufba.br/ri/handle/ri/5783

Title: Synthesis of nanosized β-BiTaO4 by the polymeric precursor method
Other Titles: MATERIALS LETTERS
Authors: Almeida, Cristiane Gomes
Andrade, Heloysa Martins Carvalho
Mascarenhas, Artur José Santos
Silva, Luciana Almeida
Keywords: β-BiTaO4;Polymeric precursor method;Nanosized particles;Nanomaterials;Semiconductors
Issue Date: 2010
Abstract: β-BiTaO4 powder was synthesized by the citrate method, using bismuth citrate and TaCl5 as precursors. The citrate gel was characterized by thermal analyses (TG and DTA), in order to determine the best polymerization temperature. The polymeric precursor is essentially amorphous and after calcination at 400 °C a mixture of tantalates, that are isomorphic to Bi3NbO7 and Bi5Nb3O15, starts to crystallize. At 600 °C, in addition to those phases, one could observe some peaks related to β-BiTaO4. Finally, at 800 °C β-BiTaO4 can be observed as a pure phase, with particle size estimated as 47 nm. The precursor polymeric method allowed obtaining β-BiTaO4 pure phase at temperatures significantly lower than those found for solid state reaction method.
Description: Acesso restrito: Texto completo. p. 1088-1090
URI: http://www.repositorio.ufba.br/ri/handle/ri/5783
ISSN: 0167-577X
Appears in Collections:Artigos Publicados em Periódicos (Quimica)

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