Electrophoretic deposition of BaTi0.85Zr0.15O3 nanopowders

• Published in: Materials research (São Carlos, São Paulo, Brazil) Vol. 16; no. 6; pp. 1344 - 1349
• Main Authors: Antonelli, Eduardo, Silva, Ronaldo Santos da, Bernardi, Maria Inês Basso, Hernandes, Antonio Carlos
• Format: Journal Article
• Language: English; Portuguese
• Published: ABM, ABC, ABPol 01.12.2013; Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)
• Subjects: barium zirconium titanate; electrophoretic deposition; ENGINEERING, CHEMICAL; ferroelectric; MATERIALS SCIENCE, MULTIDISCIPLINARY; METALLURGY & METALLURGICAL ENGINEERING; thick films; ferroelectric; electrophoretic deposition; thick films; barium zirconium titanate
• ISSN: 1516-1439; 1980-5373; 1980-5373
• DOI: 10.1590/S1516-14392013005000121

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.