Please use this identifier to cite or link to this item: http://www.repositorio.ufop.br/handle/123456789/4886
Title: Synthesis and characterisation of La0.4Ba0.6Ti0.6RE0.4O3 (where RE =Y, Yb) ceramics.
Authors: Feteira, Antônio
Elsebrock, R.
Dias, Anderson
Moreira, Roberto Luiz
Lanagan, Michael T.
Sinclair, Derek C.
Keywords: BaTiO3 and titanates
Dielectric properties
Electron microscopy
Perovskites
Issue Date: 2006
Citation: FETEIRA, A. et al. Synthesis and characterisation of La0.4Ba0.6Ti0.6RE0.4O3 (where RE =Y, Yb) ceramics. Journal of the European Ceramic Society, Amsterdam, v. 26, n.10-11, p. 1947-1951, 2006. Disponível em: <http://www.sciencedirect.com/science/article/pii/S0955221905008277>. Acesso em: 02 fev. 2015.
Abstract: La0.4Ba0.6Ti0.6RE0.4O3 (where RE =Y, Yb) powders were synthesised by the mixed oxide route. According to laboratory X-ray diffractometry both compositions are single-phase and can be indexed on the Pm3m space group; however, electron diffraction suggests the occurrence of anti-phase octahedral tilting or 1:1 ordering. Ceramics fired at 1600 ◦C for 4 h exhibit an average grain size of ∼20_m. Bright field TEM images suggest the occurrence of chemical inhomogeneity in both compositions. The dc conductivities and Raman spectra are similar for both compositions; however, La0.4Ba0.6Ti0.6Y0.4O3 ceramics exhibit εr ∼57, quality factor (Qf)∼750 GHz and temperature coefficient of resonance (TCF)∼12 ppm/K, whereas La0.4Ba0.6Ti0.6Yb0.4O3 ceramics exhibit εr ∼65, Qf∼4500 GHz and TCF∼1 ppm/K.
URI: http://www.repositorio.ufop.br/handle/123456789/4886
metadata.dc.identifier.doi: https://doi.org/10.1016/j.jeurceramsoc.2005.09.095
ISSN: 0955-2219
metadata.dc.rights.license: O periódico Journal of the European Ceramic Society concede permissão para depósito deste artigo no Repositório Institucional da UFOP. Número da licença: 3577180790323.
Appears in Collections:DEQUI - Artigos publicados em periódicos

Files in This Item:
File Description SizeFormat 
ARTIGO_SynthesisCharacterisationLa.pdf280,66 kBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.