材料科学
压电
电介质
陶瓷
铁电性
相变
相(物质)
压电系数
工作(物理)
铁电陶瓷
工程物理
复合材料
光电子学
凝聚态物理
热力学
化学
物理
有机化学
工程类
作者
Yingbo Cao,Jinfeng Lin,Yunjing Shi,Guohui Li,Cheng Shi,Kun Zhu,Guanglong Ge,Chukai Chen,Fei Yan,Weiwei Yang,Lihui Xu,Bo Shen,Jiwei Zhai
标识
DOI:10.1021/acsami.2c14737
摘要
To meet the requirements of environmental friendliness, high-performance lead-free piezoelectric materials have become important materials for next-generation electronic devices. Here, lead-free and potassium-free NaNbO3 (NN)-based ceramics with high piezoelectric (d33 = 361 ± 10 pC/N) and dielectric (εr = 4500) properties were obtained by tolerant preparation techniques. The excellent piezoelectric and dielectric properties can be attributed to the relaxor morphotropic phase boundaries (R–MPB) and coexisting domain regions, which are beneficial in lowering the free energy and greatly improving the dielectric response and domain switching capability. Furthermore, the d33 of NaNbO3-10Ba(Ti0.7Sn0.3)O3-1.5NaSbO3 (NN-10BTS-1.5NS) ceramics can be maintained at 350 pC/N over the range of 25–80 °C with a change rate of less than 10%, exhibiting excellent temperature stability. Based on a series of in situ characterizations, the variations of the phase and domain structures of NN-based relaxor piezoelectric ceramics with temperature are clearly demonstrated. This work not only proposes new materials for sensors and actuators but also provides an excellent strategy for designing high-performance piezoelectric ceramics through phase and domain engineering.
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