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High-k dielectric composites of poly(2-cyanoethyl vinyl ether) and barium titanate for flexible electronics

Autoři: Piana Francesco | Pfleger Jiri | Jambor Roman | Řičica Tomáš | Macák Jan

Rok: 2017

Druh publikace: článek v odborném periodiku

Název zdroje: Journal of Applied Polymer Science

Název nakladatele: Wiley-Blackwell

Místo vydání: Hoboken

Strana od-do: "45236-1"-"45236-10"

Tituly:

Jazyk	Název	Abstrakt	Klíčová slova
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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