Developing a face-shear lead-free piezoelectric transducer through anti-parallel co-poling and its application to an omnidirectional piezoelectric transducer. Issue 5 (1st March 2023)

• Record Type: Journal Article
• Authors: Eum, Jae-Min; Kim, Eun-Ji; Kim, Dae-Su; Go, Su-Hwan; Chae, Yeon-Gyeong; Lee, Dong-Gyu; Kim, Seung Il; Choi, Yong Rak; Choi, Wonjae; Ha, Jong Moon; Seung, Hong Min; Nahm, Sahn
• Is Part Of: Ceramics international. Volume 49:Issue 5(2023)
• Page Start: 7556
• Page End: 7565
• Publication Date: 2023-03-01
• Subjects: (C) Piezoelectric properties -- (D) Perovskites -- (E) Actuators -- (E) Sensors -- Lead-free; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2022.10.252
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Face-shear deformation was observed in various square piezoelectric transducers prepared using the anti-parallel co-poling method, which led to uniform polarization and the generation and receipt of pure fundamental shear horizontal (SH0 ) waves without any Lamb wave. The amplitude of the SH0 wave was found to be proportional to the piezoelectric charge constant ( d 33 ) of the piezoceramic, suggesting that the d 33 value can be used as a figure of merit for piezoelectric transducers with strong SH0 waves. The amplitude of the SH0 wave associated with the square piezoelectric transducer is large at 0° and 90° but almost zero at 45°; therefore, a piezoelectric transducer with good omnidirectional properties needs to be developed. A ring-type omnidirectional piezoelectric transducer was produced using eight trapezoidal piezoceramics. The minimum amplitude of the SH0 wave generated and received by the ring type-transducer exceeded 70% of the maximum amplitude. Hence, this ring-type transducer is highly omnidirectional and can be used for nondestructive testing and structural health-monitoring applications.