Dielectric properties of barium strontium titanate thick films prepared by electrophoretic deposition

Journal Article · Wed May 06 04:00:00 EDT 2009 · Materials Research Bulletin

DOI:https://doi.org/10.1016/j.materresbull.2008.10.014· OSTI ID:21199764

Ling, Zhang ^[1]; Xi, Yao ^[1]

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1. Functional Materials Research Laboratory, Tongji University, 200092 Shanghai (China)

Ba{sub x}Sr{sub 1-x}TiO{sub 3} (x = 0.5, 0.6, 0.7) thick films were prepared by electrophoretic deposition (EPD) technique on platinum metallic foils using BaTiO{sub 3} and SrTiO{sub 3} nanoparticles with different molar proportion of 1:1, 3:2 and 7:3, respectively. An isostatic pressure method was used to increase density of the thick films before high temperature sintering. Microstructures of the deposited films were examined with XRD and SEM techniques. Porosity of the thick films decreased after the isostatic pressure process. The Ba{sub 0.5}Sr{sub 0.5}TiO{sub 3} thick films of 10 {mu}m, 15 {mu}m and 20 {mu}m showed a tunability of 28.8%, 33.3% and 33.9%, respectively, at room temperature and at a biasing field of 2 kV/mm. The dielectric constant was from 2138 to 3446 and dielectric loss was from 0.016 to 0.011 at zero bias field at 10 kHz. The temperature dependence of dielectric constant was also measured and the effect of porosity and thickness on the electrical performance of the thick films was discussed.

• OSTI ID: 21199764
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Journal Issue: 5 Vol. 44; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM COMPOUNDS
CERAMICS
DEPOSITION
DIELECTRIC MATERIALS
ELECTROPHORESIS
FILMS
KHZ RANGE 01-100
MICROSTRUCTURE
NANOSTRUCTURES
PARTICLES
PERMITTIVITY
PLATINUM
POROSITY
SCANNING ELECTRON MICROSCOPY
SINTERING
STRONTIUM TITANATES
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0273-0400 K
X-RAY DIFFRACTION