Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7897786 | Journal of the European Ceramic Society | 2018 | 10 Pages |
Abstract
In order to obtain BNT-based ceramic system with excellent electric-field-induced strain performance for actuator applications, a novel solid solution (100-x)Bi1/2(Na0.82K0.12)1/2TiO3-xBi4Ti3O12 ((100-x)BNKT-xBiT, xâ¯=â¯0-12â¯wt%) was designed and fabricated by solid state synthesis. The microstructure and related electrical properties of this material were systematically investigated. It was found that BiT is dissolved into the lattice structure of the BNKT, leading to a greater increase in the volatilization of Na and K, thus produce more A-site vacancies compared with the undoped BNKT. The 9â¯wt%BiT doped sample not only has sufficient A-site vacancies to destroy the long-range ferroelectric order of the base composition but also favors the presence of extremely stable relaxor phase at room temperature. Further, the ferroelectric-to-relaxor phase transition temperature TF-R can be effectively tuned to about 0â¯Â°C, giving rise to a large signal piezoelectric coefficient d*33 of 485â¯pm/V with a small hysteresis η of 23%.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Pengyuan Fan, Yangyang Zhang, Qi Zhang, Bing Xie, Yiwei Zhu, Mosin Ali Mawat, Weigang Ma, Kai Liu, Jianzhong Xiao, Haibo Zhang,