Huge strain and energy storage density of A-site La3+ donor doped (Bi0.5Na0.5)0.94Ba0.06TiO3 ceramics. Issue 1 (January 2017)

• Record Type: Journal Article
• Authors: Li, Fangfang; Liu, Yunfei; Lyu, Yinong; Qi, Yunhui; Yu, Zhenglei; Lu, Chongguang
• Is Part Of: Ceramics international. Volume 43:Issue 1(2017)Part A
• Page Start: 106
• Page End: 110
• Publication Date: 2017-01
• Subjects: Bismuth sodium titanate -- Phase transition -- Strain -- Energy density; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2016.09.117
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Lead-free ferroelectric [(Bi0.5 Na0.5 )0.94 Ba0.06 ]1− x La x TiO3 (BNBT-100 x La, 0≤ x ≤0.05) ceramics were prepared by the solid state sintering methods and the effects of La 3+ doping on ferroelectricity and electromechanical strain were systematically investigated. The X-ray diffraction analysis revealed that the crystal structure partly transformed from rhombohedral phase to tetragonal phase with the increasing of La 3+ donor doping. The long-range FE order dominant in pure BNBT was disrupted by La 3+ doping. For BNBT-3La, the largest maximum strain Smax was 0.53% with a high normalized strain d * 33 of 707 pm/V under 75 kV/cm at room temperature. Moreover, a phase transition happened at EF =46.06 kV/cm under the cycle of 75 kV/cm. In particularly, a slim and pinched P-E loop was obtained for BNBT-5La with a large energy density of 1.66 J/cm 3 at 105 kV/cm.