Poling of multilayer Pb(Zr0.3Ti0.7)O3/PbTiO3 thin film for pyroelectric infrared sensor application
2003; Elsevier BV; Volume: 44; Issue: 3 Linguagem: Inglês
10.1016/s1350-4495(02)00189-5
ISSN1879-0275
AutoresLing Ling Sun, Ooi Kiang Tan, Wei Guo Liu, Wei Zhu, Xi Yao,
Tópico(s)Microwave Dielectric Ceramics Synthesis
ResumoPoling of multilayer Pb(Zr0.3Ti0.7)O3/PbTiO3 thin films has been studied. Poling temperature and electrical field are optimised to achieve a high pyroelectric coefficient. The pyroelectric coefficient is found to saturate when a sufficient high poling electric field (∼350 kV/cm) is applied at room temperature. Further improvement of the pyroelectric properties is achieved with the increasing of poling temperature (up to 180 °C). Pyroelectric coefficient of the poled PZT/PT film (at 350 kV/cm, 180 °C) is measured using a modified Byer–Roundy method to be 250 μC/m2 K. Compared with the pure Pb(Zr0.3Ti0.7)O3 thin film, the multilayer PZT/PT thin film has a lower pyroelectric coefficient, however, its dielectric constant and dielectric loss are reduced. Thus the multilayer PZT/PT film has higher figures of merit for pyroelectric application.
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