Electrophoretic deposition of Ba0.77Ca0.23TiO3 nanopowders
| Autor: | Ronaldo Santos da Silva, Antonio Carlos Hernandes, Antonio Ricardo Zanatta, Fábio Simões de Vicente, Eduardo Antonelli |
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| Rok vydání: | 2008 |
| Předmět: |
Materials science
Acetylacetone Metals and Alloys Sintering chemistry.chemical_element Mineralogy Microstructure Industrial and Manufacturing Engineering Computer Science Applications Electrophoretic deposition chemistry.chemical_compound chemistry Chemical engineering Modeling and Simulation Ceramics and Composites Deposition (phase transition) Particle size Crystallite Platinum |
| Zdroj: | Journal of Materials Processing Technology. 203:526-531 |
| ISSN: | 0924-0136 |
| DOI: | 10.1016/j.jmatprotec.2007.10.061 |
| Popis: | Ba0.77Ca0.23TiO3 (BCT23) nanometric powders, synthesized by the modified Pechini method, were used as precursor to produce thick films (50–130 μm) 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 °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 °C/2 h from Acac + EtOH solution. |
| Databáze: | OpenAIRE |
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