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In this work, we present analytical and finite element method (FEM) modeling to describe the time dependence of the pyroelectric current of embedded piezoelectrics generated by a laser pulse. Analytical solutions of the one-dimensional heat transfer equation consider a two-layer model, account for the experimentally derived heat pulse shape and the heat loss to the environment. They serve as a proof...
In this work, lead magnesium niobate-lead titanate (1−x)Pb(Mg1/3Nb2/3)O3-xPbTiO3 ((1−x)PMN-xPT) thin films with PT-fractions of 6.5 to 20% were fabricated on Pt(111)-coated Si wafers by multi-target reactive sputtering using four metallic targets (Pb, Mg, Nb, Ti). In order to increase the dielectric strength, co-doping with Mn was performed by co-sputtering of MnO targets. The electrocaloric temperature...
In this work, lead magnesium niobate-lead titanate (1-x)Pb(Mg1/3Nb2/3)O3-xPbTiO3(PMN-PT) thin films with PT-fractions of 6.5 to 20% were fabricated on Pt(111)-coated Si wafers for the first time by multitarget reactive sputtering using four metallic targets (Pb, Mg, Nb, Ti).
In this work, lead magnesium niobate-lead titanate (1-x)Pb(Mg1/3Nb2/3)O3-xPbTiO3(PMN-PT) thin films with PT-fractions of 6.5 to 20% were fabricated on Pt(111)-coated Si wafers for the first time by multitarget reactive sputtering using four metallic targets (Pb, Mg, Nb, Ti).
In this work, we evaluate the pyroelectric response of PZT plates and rods embedded in epoxy resin, low temperature cofired ceramics and polyamide by measuring the pyroelectric current spectrum originated by temperature oscillations generated by illuminating the sample surface with a square-wave-modulated laser beam. Transfer functions H(iω) describing amplitude attenuation and phase lag at each modulation...
In this work, the polarization state of piezofiber composites consisting of lead zirconate titanate (PZT) fibers embedded in epoxy resin was evaluated by means of thermal wave methods. The average pyroelectric coefficient was found to be one order of magnitude less than that of PZT ceramic plates. The pyroelectric current spectrum was recorded during irradiating the composites with an intensity-modulated...
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