Fatigue-resistant, temperature-insensitive strain behavior and strong red photoluminescence in Pr-modified 0.92(Bi0.5Na0.5)TiO3–0.08(Ba0.90Ca0.10)(Ti0.92Sn0.08)O3 lead-free ceramics. Issue 2 (February 2017)

• Record Type: Journal Article
• Authors: Hao, Jigong; Xu, Zhijun; Chu, Ruiqing; Li, Wei; Fu, Peng; Du, Juan; Li, Guorong
• Is Part Of: Journal of the European Ceramic Society. Volume 37:Issue 2(2017)
• Page Start: 877
• Page End: 882
• Publication Date: 2017-02
• Subjects: Ceramics -- Ferroelectrics -- Electrical properties -- Fatigue -- Luminescence; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2016.09.015
• Languages: English
• ISSNs: 0955-2219

Abstract

Abstract: An electric-field-induced large strain and strong photoluminescence was achieved by introducing trivalent Pr 3+ as the activator into 0.92(Bi0.5 Na0.5 )TiO3 − 0.08(Ba0.90 Ca0.10 )(Ti0.92 Sn0.08 )O3 (BNT−8BCST) ceramics. Around a critical composition of 0.4 mol% Pr 3+, a large strain of ∼0.39% with a relatively small hysteresis compared with existing lead-free Bi-perovskite ceramics was obtained. In particular, the strain is very resistant to field cycling and thermal shock, giving the materials attractive for its exceptionally good fatigue resistance and high temperature stability. Besides the excellent electrical properties, Pr 3+ -modified BNT−8BCST host exhibits a strong photoluminescence with a bright red emission at 610 nm assigned to 1 D2 → 3 H4 transitions of the Pr 3+ ions upon a blue light excitation of 400–500 nm. The photoluminescence can be enhanced through poling treatment of the samples. Moreover, samples have a superior water resistance property which almost maintaining the same photoluminescence intensity after 40 h water immersion time. These results suggest the material may have potential application as a multifunctional device such as "on-off" actuator and electric field-controlled photoluminescence devices by integrating its excellent luminescence and electrical properties.