2026-04-17T02:57:57Zhttps://recercat.cat/oai/request

oai:recercat.cat:2072/4358792024-10-31T03:06:59Zcom_2072_98col_2072_378192

urn:hdl:2072/435879 Synthesis and structural characterization of nanocrystalline batio3 at various calcination temperatures Fuentes, Sandra Céspedes Mulero, Francisco Muñoz, Pamela Chávez Ángel, Emigdio Padilla Campos, Luis Hydrothermal synthesis Nanoparticles Raman spectroscopy Theoretical calculations Transmission electron microscopy X-ray diffraction 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. 2013 Article Ministerio de Ciencia e Innovación FIS2009-10150 Journal of the Chilean Chemical Society ; Vol. 58, Núm. 4 (December 2013), p. 2077-2081 open access 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. https://creativecommons.org/licenses/by/4.0/