Large strain response in (Mn, Sb)–modified (Bi0.5Na0.5)0.935Ba0.065TiO3 lead–free piezoelectric ceramics. Issue 13 (October 2016)

• Record Type: Journal Article
• Authors: Li, Liangliang; Hao, Jigong; Xu, Zhijun; Li, Wei; Chu, Ruiqing; Li, Guorong
• Is Part Of: Ceramics international. Volume 42:Issue 13(2016)
• Page Start: 14886
• Page End: 14893
• Publication Date: 2016-10
• Subjects: Lead–free ceramics -- Phase transition -- Ferroelectricity -- Field–induced strain; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2016.06.127
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Lead–free piezoelectric ceramics (Bi0.5 Na0.5 )0.935 Ba0.065 Ti1– x (Mn0.5 Sb0.5 ) x O3 (BNBT6.5– x MS, x =0.005, 0.010, 0.015, 0.020) were prepared by conventional solid state reaction sintering technique. All ceramics present a pure perovskite phase structure, indicating that (Mn, Sb) has completely diffused into the BNBT6.5 lattice in the studied components. The addition of (Mn, Sb) disrupted the ferroelectric long–range order and promoted the electric field induced strain response. At x =0.015, a large electric field–induced unipolar strain of 0.48% (at an applied electric field of 80 kV/cm) with normalized strain d 33 * ( S max / E max ) of 602 pm/V are achieved. Temperature dependent measurements of both polarization and strain from room temperature to 120 °C were also studied, and the results suggest that the origin of the large strain is due to a reversible field–induced non–polar relaxor phase to polar ferroelectric phase transformation.