Synthesis and structural characterization of nanocrystalline batio3 at various calcination temperatures
Fuentes, Sandra (Centro para el Desarrollo de la Nanociencia y la Nanotecnología (Chile))
Céspedes Mulero, Francisco (Universidad Católica Del Norte)
Muñoz, Pamela (Universidad Católica Del Norte)
Chávez Ángel, Emigdio (Institut Català de Nanociència i Nanotecnologia)
Padilla Campos, Luis (Universidad de Antofagasta. Departamento de Química)

Fecha:	2013
Resumen:	Barium titanate (BaTiO3) powders with particle sizes about 50 nm in diameter were synthesized using a hydrothermal route. The powders were characterized using various experimental techniques such as XRD, TEM and Raman spectroscopy, and they showed a good crystallinity and homogeneity without heat treatments. Also, Raman spectra showed the presence of the tetragonal phase. In addition, various calcination treatments were made to BaTiO3 powders with the purpose to improve their ferroelectric properties. In general, calcination treatments improved the crystallinity and homogeneity of the samples considerably but did not modify the internal structure of the BaTiO3, which was observed in the Raman spectra. On the other hand, from theoretical calculations were established that the cubic phase should be better dielectric in comparison with the tetragonal phase, but this latter would have better optical properties. However, experimental evidences are indicative that the cubic phase would predominate in the synthesis of the compound.
Ayudas:	Ministerio de Ciencia e Innovación FIS2009-10150
Derechos:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Lengua:	Anglès
Documento:	Article ; recerca ; Versió publicada
Materia:	Hydrothermal synthesis ; Nanoparticles ; Raman spectroscopy ; Theoretical calculations ; Transmission electron microscopy ; X-ray diffraction
Publicado en:	Journal of the Chilean Chemical Society, Vol. 58, Núm. 4 (December 2013) , p. 2077-2081, ISSN 0717-9707

DOI: 10.4067/S0717-97072013000400038

5 p, 477.5 KB

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