Investigation on co‐fired multilayer KNN‐based lead‐free piezoceramics. Issue 10 (4th June 2014)

• Record Type: Journal Article
• Authors: Gao, Renlong; Chu, Xiangcheng; Huan, Yu; Wang, Xiaohui; Li, Longtu
• Is Part Of: Physica status solidi. Volume 211:Issue 10(2014:Oct.)
• Page Start: 2378
• Page End: 2383
• Publication Date: 2014-06-04
• Subjects: interface -- lead‐free -- multilayer -- piezoceramics; Solid state physics -- Periodicals; Solids -- Industrial applications -- Periodicals; 530.41
• DOI: 10.1002/pssa.201431156
• Languages: English
• ISSNs: 1862-6300

Abstract

Abstract : Potassium sodium niobate (KNN)‐based lead‐free piezoelectric ceramics were used to fabricate multilayer ceramics containing an Ag/Pd inner electrode via a tape casting and co‐firing process. The interfacial microstructure between the electrode and ceramic was characterised using a transmission electron microscope. The apparent electric‐field‐induced piezoelectric response was enhanced to 452 pm V −1 by the multilayer structure. A laser Doppler vibrometer was used to test the high frequency piezoelectric properties, and a remarkable apparent dynamic response of 1839 pm V −1 with a normalised thickness strain ( S max / E max ) of 369 pm V −1 was obtained at the resonance frequency 131.8 kHz. These results indicate that KNN‐based multilayer ceramics are promising substitutes for lead‐based ceramics as actuators and transducers.