Electrophoretic deposition of BaTi0.85Zr0.15O3 nanopowders

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Date
2013-12-01Author
Antonelli, Eduardo [UNIFESP]
Silva, Ronaldo Santos da
Bernardi, Maria Inês Basso
Hernandes, Antonio Carlos
Type
ArtigoISSN
1516-1439Is part of
Materials ResearchDOI
10.1590/S1516-14392013005000121Metadata
Show full item recordAbstract
The present study reports the results of thick films (20-130 µm) produced through electrophoretic deposition of BaTi0.85Zr0.15O3 (BTZ) nanometric powders synthesized by the Pechini's method. The BTZ powderscalcined at 600°C/2h presented a single crystalline phase with an average particle size of ~20nm. To thick films deposition, a stable suspension of acetylacetone (Acac) and ethanol (EtOH)was prepared and the powder was deposited on platinum substrates. The viscosity of BTZ powders suspensions as a function of operational pH (OpH)was measured and the reactions between nanoparticles and the media were discussed. A milling process was used to deagglomerate the powders and it had a great influence in the suspension stability and deposition of thick films. Dense and crack-free thick films were obtained after sintering at 1220 °C/1h. The dielectric properties results, comparable with those of bulk BTZ ceramics, suggested potential applications of the EPD process for the deposition of ferroelectric/piezoelectric thick films.
Citation
Materials Research. ABM, ABC, ABPol, v. 16, n. 6, p. 1344-1349, 2013.Sponsorship
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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