Publicação: Syntheses of bismuth titanate templates obtained by the molten salt method
Carregando...
Data
Orientador
Coorientador
Pós-graduação
Curso de graduação
Título da Revista
ISSN da Revista
Título de Volume
Editor
Tipo
Artigo
Direito de acesso
Acesso restrito
Resumo
Bismuth titanate templates (Bi4Ti3O12) were synthesized by the molten salt method in Na2SO4 and K2SO4 fluxes, using an amorphous Bi4Ti 3O12 precursor and a mechanically mixed Bi 2O3+TiO2 mixture as the starting materials. The templates were characterized by means of X-Ray Diffraction, FT-IR, FT-Raman, FEG-SEM and TEM. The templates are free of secondary phases and present orthorhombic structure with orientation in the c-plane. FT-IR suggests no traces of sulfate groups revealing that the molten salt synthesis was beneficial for elimination of inorganic species and for the arrangement of individual nanocrystals into ordered lattices. FEG-SEM analyses of BIT templates revealed that most of the grains were homogeneous with a length of 3.1 μm and a width of 0.3 μm and had plate-like morphology. TEM investigations show that the c-axis of the perovskite units is parallel to the thickness direction of the grains and no liquid-phase was formed during BIT phase formation. © 2013 Elsevier Ltd and Techna Group S.r.l.
Descrição
Palavras-chave
A. Ceramics, B. Chemical syntheses, B. Powder metallurgy, C. X-ray diffraction, Bismuth titanate, Inorganic species, Molten salt method, Molten salt synthesis, Orthorhombic structures, Plate-like morphology, Thickness direction, Amorphous materials, Bismuth, Fluxes, Powder metallurgy, Titanium compounds, X ray diffraction, Fused salts
Idioma
Inglês
Como citar
Ceramics International, v. 39, n. 7, p. 7291-7296, 2013.
