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Dielectric Properties of Electrophoretically Deposited and Isothermally Pressed BaTiO3 Thick Films

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Thick BaTiO3 films were prepared on platinum metallic foils by the electrophoretic deposition (EPD) technique using BaTiO3 nanoparticles. In order to increase the density of the thick film, the green film was pressed under an isostatic pressure of 200 MPa before high-temperature sintering. The microstructures of deposited films were examined using X-ray diffraction and scanning electron microscopy techniques. Dielectric properties of the thick films were investigated. As the films grow thicker, the dielectric constant increases gradually and the dielectric loss decreases slightly. The experimental results indicate that isostatic pressing is an effective method to process thick films with dense microstructure and better dielectric properties.

Document Type: Research Article


Affiliations: Functional Materials Research Laboratory, Tongji University, Shanghai 200092, China

Publication date: June 1, 2008


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