We studied the pyroelectric properties of lead titanate-zirconate (PZT)-based layers prepared with standard procedures of thick film technology on alumina substrate (950°C peak temperature) and with buried interdigital electrodes. The investigation was aimed at setting adequate procedures and sample configurations for measuring the relevant pyroelectric quantities (e.g. pyroelectric coefficient , detectivity, responsivity, noise equivalent power, quality factors), with no ambition to optimise the material pyroelectric performances . The results show that the pyroelectric coefficient of our porous layers is lower than that of ceramic and dense thick-films of comparable composition, but the thermal properties of our samples (low heat capacity and thermal conductivity) result in quality factors better than the corresponding values either for ceramic PZT or other pyroelectric materials (including TGS and LiTaO_3). Hence porous ferroelectric thick-films are good candidate for new pyroelectric devices.
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