Electrophoretic deposition of Ba0.77Ca0.23TiO3 nanopowders

Ba0.77Ca0.23TiO3 (BCT23) nanometric powders, synthesized by the modified Pechini method, were used as precursor to produce thick films (50-130 mum) employing the electrophoretic deposition (EPD) technique. The BCT23 powder presented a single crystalline phase with an average particle size and a crys...

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Bibliographic Details
Published in:Journal of materials processing technology 2008-07, Vol.203 (1-3), p.526-531
Main Authors: Antonelli, Eduardo, Silva, Ronaldo Santos, de Vicente, Fábio Simões, Zanatta, Antônio Ricardo, Hernandes, Antonio Carlos
Format: Article
Language:English
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Summary:Ba0.77Ca0.23TiO3 (BCT23) nanometric powders, synthesized by the modified Pechini method, were used as precursor to produce thick films (50-130 mum) employing the electrophoretic deposition (EPD) technique. The BCT23 powder presented a single crystalline phase with an average particle size and a crystallite size of 60 nm and 20 nm, respectively, when calcined at 800 deg C/2 h. BCT23 thick films were deposited on platinum substrates starting from different suspensions prepared by dispersion of the powder into: isopropyl alcohol (IPA) or a mixture of acetylacetone (Acac) and ethanol (EtOH) (1:1, volumetric ratio). A milling process was used to deagglomerate the powders in order to increase the suspension stability and improving the deposition. Dense and crack free thick films with uniform microstructure were obtained after sintering at 1300 deg C/2 h from Acac + EtOH solution.
ISSN:0924-0136
DOI:10.1016/j.jmatprotec.2007.10.061