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High-k dielectric composites of poly(2-cyanoethyl vinyl ether) and barium titanate for flexible electronics
Authors: Piana Francesco | Pfleger Jiri | Jambor Roman | Řičica Tomáš | Macák Jan
Year: 2017
Type of publication: článek v odborném periodiku
Name of source: Journal of Applied Polymer Science
Publisher name: Wiley-Blackwell
Place: Hoboken
Page from-to: "45236-1"-"45236-10"
Titles:
Language Name Abstract Keywords
cze Vysoko dielektriké komposity poly(2-cyanoethyl vinyl ether) a BaTiO3 pro flexibilní elektroniku Byly připraveny vysoko dielektriké komposity poly(2-cyanoethyl vinyl ether) a BaTiO3 pro flexibilní elektroniku.
eng High-k dielectric composites of poly(2-cyanoethyl vinyl ether) and barium titanate for flexible electronics High-k dielectric composite material for electronic applications was obtained by mixing a polymer with high dielectric constant, poly(2-cyanoethyl vinyl ether) (CEPVA), and highly crystalline barium titanate (BT). Barium titanate nanoparticles of a size in the range 40-90nm were prepared by the solvothermal method. By optimizing the reaction conditions, the formation of carbonate impurities and the agglomeration of formed nanoparticles were significantly reduced compared to state-of-the-art procedures. Dielectric spectroscopy was measured in the range of 0.01Hz to 10 MHz and showed the dielectric constant to be epsilon similar to 35-40 with only 30 vol % content of BT in the composite. Extrapolating to 100% BT nanoparticle concentration and using the Lichtenecker model, the dielectric constant epsilon = 365 +/- 27 at 10 kHz was obtained. The relaxation and electrical properties were investigated in depth, and a new relaxation phenomenon was revealed. CEPVA/BT composite is considered suitable for electronic applications, in which high together with a good mechanical flexibility are required, such as organic field effect transistors. composites; dielectric properties; nanocrystals; nanoparticles; nanowires

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