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Pyroelectric Ceramic/Polymer Composite with Electrically Conducting Matrix Material

To improve the coupling of the pyroelectric activity of the ferroelectric particles to the electrodes of a composite film we propose the use of a matrix material which is not a perfect insulator but shows some electric conduction. Theoretical modelling results show that the pyroelectric coefficient of these composites is drastically enhanced. Furthermore, the noise figure of merit can be optimized by a proper selection of the electric conductivity of the polymer matrix. For the practical application in a sensor, these new composites have the additional advantage that the gate voltage of the first field effect transistor can be supplied through the resistance of the pyroelectric sensor element.