Abstract
In the present work 0–3 composites of Relaxor-Ceramic/PVDF-TRFE with different volume fractions of ceramic powder are processed using solution deposition techniques. Free standing thick films of up to 100 µm thickness were fabricated via the doctor blade method while thin films of up to 10 µm thickness were deposited on silicon wafers using spin coating.The microstructure was investigated via scanning electron microscopy. Effects of the volume fraction of the ceramic on the phase transition were studied in a wide temperature range using DSC. The dielectric properties were investigated as a function of temperature via impedance analysis. Finally low and high frequency pyroelectric properties were obtained.It is shown that homogeneous films with a homogeneous distribution of ceramic particles can be obtained using appropriate solvents for both the polymer and the powder. The DSC measurements show that with increasing powder volume fraction the phase transition temperature in general slightly decreases. The dielectric constant increases with increasing ceramic volume fraction whereby the values do not agree with those calculated based on 0–3 connectivity. Relaxation effects of the composites are also reported. Pyroelectric measurements show a good response of the composite with figure of merits comparable to that of PZT films.
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