Electrophoretic deposition of BaTi0.85Zr0.15O3 nanopowders

Electrophoretic deposition of BaTi0.85Zr0.15O3 nanopowders

Autor Antonelli, Eduardo Autor UNIFESP Google Scholar
Silva, Ronaldo Santos da Google Scholar
Bernardi, Maria Inês Basso Google Scholar
Hernandes, Antonio Carlos Google Scholar
Instituição Universidade Federal de São Paulo (UNIFESP)
Universidade de São Paulo (USP)
Universidade Federal de Sergipe Departamento de Física Grupo de Materiais Cerâmicos Avançados
Resumo 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.
Palavra-chave barium zirconium titanate
thick films
electrophoretic deposition
ferroelectric
Idioma Inglês
Financiador 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)
Data de publicação 2013-12-01
Publicado em Materials Research. ABM, ABC, ABPol, v. 16, n. 6, p. 1344-1349, 2013.
ISSN 1516-1439 (Sherpa/Romeo, fator de impacto)
Publicador ABM, ABC, ABPol
Extensão 1344-1349
Fonte http://dx.doi.org/10.1590/S1516-14392013005000121
Direito de acesso Acesso aberto Open Access
Tipo Artigo
Web of Science WOS:000328910600018
SciELO S1516-14392013000600018 (estatísticas na SciELO)
Endereço permanente http://repositorio.unifesp.br/handle/11600/8012

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