Properties and Applications of Screen Printed Piezoelectric Films

TLDR: In this article, a new piezoelectric transducer is constructed by fabricating a thin piezelectric film on a PZT sheet, which is then matched to a piezeolectric ceramic (PZT) sheet.

Abstract: Thick piezoelectric films are fabricated by screen printing and firing the pastes prepared with either the calcined or the sintered composition of Pb0.9875[(Zr0.52Ti0.48)0.975Nb0.025]O3. Lithium carbonate and equal amount of Bi2O3 are added as liquid phases to promote densification. The spontaneous polarization, Ps, of the fabricated piezoelectric films ranges from 6 to 10 µC/cm2, the remanent polarization, Pr, is from 3 to 8 µC/cm2, and the coercive force lies between 1.8 to 4KV/mm. Bimorph structure is formed by fabricating the piezoelectric film on a piezoelectric ceramic (PZT) sheet. The film and the PZT sheet are oppositely poled for buzzer application. By fabricating the piezoelectric film on stainless steel sheet directly, a new piezoelectric transducer is formed, with better performance and durability to temperature higher than 100°C.