(K0.5Na0.5)NbO3 lead-free ceramics with improved piezoelectricity and field-induced strain. Issue 1 (January 2019)

• Record Type: Journal Article
• Authors: Huang, Rongxia; Zhao, Yongjie; Yan, Dong
• Is Part Of: Ceramics international. Volume 45:Issue 1(2019)
• Page Start: 1450
• Page End: 1454
• Publication Date: 2019-01
• Subjects: Sintering behavior -- Ferroelectric property -- Piezoelectric property -- Strain property; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2018.09.275
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: The sintering additive 0.4ZnO-0.6B2 O3 (abbreviated as ZnB) was proposed to improve the sintering behavior of (K, Na)NbO3 ceramics. The influence of ZnB on the microstructure and electrical properties of (K, Na)NbO3 ceramics was carefully investigated in detail. Results demonstrated that during the sintering process a liquid phase can form at a relative low temperature, which could favor and accelerate the densification of (K, Na)NbO3 ceramics. Moreover, it was found that (K, Na)NbO3 ceramics with 1.2 wt% ZnB exhibited excellent properties with the piezoelectric constant of d 33 = 134 pC/N and planar electromechanical coupling coefficient of k p = 40%. Moreover, the field induced strain of 0.135@5 kV/mm was also achieved with this composition. Meanwhile, the mechanism for this enhancement of property was discussed.