Significantly decreased depolarization hydrostatic pressure of 3D‐printed PZT95/5 ceramics with periodically distributed pores. Issue 1 (4th September 2021)

• Record Type: Journal Article
• Authors: Jia, Jicai; Nie, Hengchang; He, Xin; Feng, Chun; Zhu, Min; Wu, Chengtie; Wang, Genshui; Dong, Xianlin
• Is Part Of: Journal of the American Ceramic Society. Volume 105:Issue 1(2022)
• Page Start: 412
• Page End: 418
• Publication Date: 2021-09-04
• Subjects: 3D printing -- hydrostatic pressure -- periodic porous structure -- phase transition depolarization -- PZT95/5 ferroelectric ceramics; Ceramics -- Periodicals; 620.1405
• DOI: 10.1111/jace.18080
• Languages: English
• ISSNs: 0002-7820

Abstract

Abstract: Pb0.99 (Zr0.95 Ti0.05 )0.98 Nb0.02 O3 ferroelectric ceramics with porous structure of periodic distribution were fabricated successfully via Direct Ink Writing, a type of 3D printing technique. The effect of periodically distributed porous microstructure on the dielectric, ferroelectric, as well as hydrostatic‐pressure‐induced depolarization properties of PZT95/5 ferroelectric ceramics, was investigated. The printed porous ceramics exhibit relatively good viscoelasticity to retain the periodic structure during 3D printing and drying. In contrast with dense PZT95/5 ferroelectric ceramics prepared by conventional solid‐state sintering, low bulk density of the periodically distributed porous PZT95/5 ceramics leads to a decreased remanent polarization of 22.9 µC/cm 2 under 2 kV/mm. As the hydrostatic pressure increased, the poled periodically distributed porous PZT95/5 ceramics depolarize sharply under a low and narrow hydrostatic pressure range of 113–116 MPa with a released charge density of 23.9 µC/cm 2, while the poled dense PZT95/5 ceramics depolarize under a range of 250–278 MPa. Therefore, the introduction of periodically distributed micropores into PZT95/5 ceramics decreases the ferroelectric‐to‐antiferroelectric phase transition hydrostatic pressure significantly and maintained relatively excellent other properties simultaneously, such as temperature stability and low dielectric loss. The almost sharp depolarization behavior under a significantly decreased hydrostatic pressure demonstrates that periodically distributed porous PZT95/5 ferroelectric ceramics fabricated controllably by 3D printing exhibit excellent performances and prospects in mechanical–electrical energy conversion applications.