Comparison of structural, ferroelectric, and strain properties between A-site donor and acceptor doped Bi1/2(Na0.82K0.18)1/2TiO3 ceramics. (July 2015)

• Record Type: Journal Article
• Authors: Dinh, Thi Hinh; Bafandeh, Mohammad Reza; Kang, Jin-Kyu; Hong, Chang-Hyo; Jo, Wook; Lee, Jae-Shin
• Is Part Of: Ceramics international. Volume 41(2015)Supplement 1
• Page Start: S458
• Page End: S463
• Publication Date: 2015-07
• Subjects: B. Defects -- C. Ferroelectric properties -- C. Piezoelectric properties -- Solid state reaction; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2015.03.150
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Effects of Li- and La-doping on the structural, ferroelectric, and strain properties of Bi1/2 (Na0.82 K0.18 )1/2 TiO3 (BNKT) ceramics were compared. In this study, Li + was selected as the A-site acceptor and La 3+ as the A-site donor. Li doping resulted in hardening of BNKT with an improved mechanical quality factor ( Q m ) of 253 and an increased coercive field ( E c ), while La doping brought about a softening effect that was evidenced by an improved piezoelectric constant ( d 33 ) of 172 pC/N and decreased E c . In addition, the large normalized bipolar strain ( S max / E max ) was obtained up to 650 pm/V in 3 mol% La-doped BNKT.