Fabrication of bimorph lead zirconate titanate thick films on metal substrates via the cold sintering-assisted process. (15th August 2020)

• Record Type: Journal Article
• Authors: Wang, Dixiong; Dursun, Sinan; Gao, Lisheng; Morandi, Carl S.; Randall, Clive A.; Trolier-McKinstry, Susan
• Is Part Of: Acta materialia. Volume 195(2020)
• Page Start: 482
• Page End: 490
• Publication Date: 2020-08-15
• Subjects: Lead zirconate titanate -- Cold sintering -- Co-firing -- Piezo MEMS -- Energy harvester; Materials -- Periodicals; Materials science -- Periodicals; Materials -- Mechanical properties -- Periodicals; Metallurgy -- Periodicals; Chemistry, Inorganic -- Periodicals; 620.112
• DOI: 10.1016/j.actamat.2020.05.053
• Languages: English
• ISSNs: 1359-6454

Abstract

Abstract: A novel process was developed for the fabrication of 5–50 µm lead zirconate titanate (PZT) thick films on metal substrates. Tape cast PZT with a methyl cellulose binder was burned out at 275 °C, humidified, and then partially densified at 300 °C by cold sintering with a wet lead nitrate liquid phase. Lamination of the green tape on dense metal foils led to incomplete densification due to constrained sintering. However, when metal foils were replaced with tape cast Cu, fully sintered PZT/Cu/PZT composites were acquired after a secondary heat treatment at 800 °C. The PZT films has a relative permittivity over 500 and a loss tangent ~12% at 100 Hz because of a Cu2 O interface between the PZT and Cu presumably formed during the cold sintering process. The polarization-electric field hysteresis loop shows a remanent polarization over 20 µC/cm 2, and the e31, f of the samples is -4.7 C/m 2 . Graphical abstract: Image, graphical abstract