Berlin 2012 – scientific programme

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DF: Fachverband Dielektrische Festkörper

DF 13: Poster II

DF 13.3: Poster

Wednesday, March 28, 2012, 15:00–17:30, Poster E

Frequency dependency of the complex elastic stiffnesses of some ferroelectric ceramics — •Ulrich Straube and Horst Beige — Institute of Physics, University Halle, Germany

Ferroelectric ceramic materials exhibit pronounced temperature dependencies of their dielectric properties. The dielectric spectroscopy is used in a broad frequency region with standard equipment to analyze the dielectric material properties. The elastic spectroscopy allows the determination of the elastic stiffness frequency dispersion, but rather different measurement techniques have to be applied for this purpose.

Examples of stiffness determinations with pulse ultrasound at 5 MHz and dynamical mechanical analysis in a frequency range of 0.01 Hz up to 10 Hz and temperatures from 170 K up to 420 K are presented. The investigation are performed using lead zirconium titanate and barium titanate stannate ceramics.