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DF: Fachverband Dielektrische Festkörper

DF 6: Poster Session DF

DF 6.3: Poster

Montag, 16. März 2015, 19:00–21:00, Poster C

Dielectric, ferroelectric, and energy density properties of barium titanate based ceramics — •Tino Band and Martin Diestelhorst — Institute of Physics, Martin-Luther-University Halle-Wittenberg, Germany

Barium titanate (BaTiO₃) has been investigated extensively as a dielectric for energy storage due to its high dielectric constant. To achieve higher energy densities a large dielectric breakdown strength (BDS) should be reached by adding a glass or polymer. As is generally known the matrix influences also the dielectric response of the final capacitor. We performed impedance spectroscopy, hysteresis and DC measurements on the ceramics to characterize them. As a result we present the influence of sample properties, like thickness, fraction of the additive or sintering temperature, and external factors, such as frequency or amplitude. Additional we discuss possible effects e.g. interfacial polarization or porosity.