Dielectric behaviour of thin films of β-PVDF/PZT and β-PVDF/BaTiO3composites

✍ Scribed by R. Gregorio; M. Cestari; F. E. Bernardino

• Publisher: Springer
• Year: 1996
• Tongue: English
• Weight: 491 KB
• Volume: 31
• Category: Article
• ISSN: 0022-2461
• DOI: 10.1007/bf00356003

✦ Synopsis

Thin films of the composites formed between poty(vinylidene fluoride) (PVDF) and lead zirconium titanate (PZT) and also barium titanate with 0-3 connectivity, have been obtained by dispersion of the ceramic powder in a solution of PVDF in dimethylacetamide DMA. Evaporation of the solvent at 65 ~ allowed crystallization of PVDF predominantly in the polar 13 phase, regardless of the amount of PZT or BaTiO3 powder added upto 40 vol %. The relative permittivity and loss index values were determined for the pure components and for the composites with different ceramic contents, in the frequency range of 100 Hz to 13 MHz. An increase in PZT or BaTiOa content resulted in an increase in the relative permittivity of the composites, and the experimental results are shown to be in good agreement with those calculated from the theoretical expression of Yamada etaL [1]. The dc electrical conductivity of composites with different compositions was also determined.