High and temperature-insensitive piezoelectric performance in the lead-free Sm-doped BiFeO3–BaTiO3 ceramics with high Curie temperature. Issue 18 (15th September 2022)

• Record Type: Journal Article
• Authors: Habib, Muhammad; Ahmad, Pervaiz; Akram, Fazli; Kebaili, Imen; Rahman, Attaur; Din, Israf Ud; Javid Iqbal, Muhammad; Kim, Myong-Ho; Lee, Soonil; Uddin Khandaker, Mayeen; Goo Yeo, Hong; Karoui, Abdennaceur; Song, Tae Kwon
• Is Part Of: Ceramics international. Volume 48:Issue 18(2022)
• Page Start: 26608
• Page End: 26617
• Publication Date: 2022-09-15
• Subjects: Lead-free piezoelectric -- BiFeO3–BaTiO3 -- Donor-doping -- Temperature-insensitive; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2022.05.355
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Large sensor piezoelectric constant ( d 33 = 334 pC/N) and superior actuator piezoelectric constant ( d 33 * = 552 pm/V) as well as a high Curie temperature ( T C = 454 °C) were obtained simultaneously in the lead-free 0.67Bi1.03 FeO3 -0.33Ba1- x Sm x TiO3 ceramics. Such an excellent and temperature-insensitive piezoelectric performance with only 10% temperature variation of piezoelectric strain at the range of 25–125 °C is highly desirable for real applications. The structural origin of the enhanced piezoelectric performance is mainly attributed to the morphotropic phase boundary and the highest known tetragonality ( c T / a T = 1.02) in such materials. Transmission electron microscopy and electro-mechanical phenomenological theory demonstrate that the superior d 33 and d 33 * are associated with the hybrids nanodomains (60–90 nm) and flattened thermodynamic energy profile owing to the local structure heterogeneity. These results are superior as the piezoelectric properties are temperature-independent and the material has large d 33 *, and high T C compared to other lead-free piezoelectric ceramics.