Topotatic-like phase transformation of amorphous lead titanate to cubic lead titanate
Carregando...
Data
Orientador
Coorientador
Pós-graduação
Curso de graduação
Título da Revista
ISSN da Revista
Título de Volume
Editor
Amer Ceramic Soc
Tipo
Artigo
Direito de acesso
Acesso restrito
Resumo
The crystallization process of lead titanate (PT) prepared using the polymeric precursor method was investigated using X-ray diffractometry, Raman spectroscopy, electron microscopy, and X-ray absorption spectroscopy techniques. The results showed that amorphous PT was formed by an O-Ti-O structure composed of fivefold and sixfold oxygen-coordinated titanium. The local structure of the amorphous PT phase was similar to that of the cubic PT phase, i.e., similar coordination number and similar bond lengths, leading to a topotactic-like transformation during the phase transformation from amorphous to cubic perovskite PT. Because of the low crystallization temperature, every transformation observed during the crystallization process was associated with a short-range rearrangement process.
Descrição
Palavras-chave
Idioma
Inglês
Citação
Journal of the American Ceramic Society. Westerville: Amer Ceramic Soc, v. 85, n. 9, p. 2166-2170, 2002.
