压电
材料科学
居里温度
相界
陶瓷
功勋
热稳定性
压电系数
相(物质)
工程物理
纳米技术
复合材料
凝聚态物理
机械工程
光电子学
化学工程
物理
铁磁性
量子力学
工程类
作者
Juan Wang,Wenying Fan,Smiley W. Cheng,Shidong Wang,Yuqi Jiang,Geng Li,Min Ju,Binglin Shen,Binjie Chen,Zhongshang Dou,Gen Wen,Fang‐Zhou Yao,Ke Wang
标识
DOI:10.1021/acsami.4c00629
摘要
High-temperature piezoelectric materials, which enable the accurate and reliable sensing of physical parameters to guarantee the functional operation of various systems under harsh conditions, are highly demanded. To this end, both large piezoelectricity and high Curie temperature are pivotal figures of merit (FOMs) for high-temperature piezoceramics. Unfortunately, despite intensive pursuits, it remains a formidable challenge to unravel the inverse correlation between these FOMs. Herein, a conceptual material paradigm of multiscale structural engineering was proposed to address this dilemma. The synergistic effects of phase structure reminiscent of a polymorphic phase boundary and refined domain morphology simultaneously contribute to a large piezoelectric coefficient d33 of 30.3 pC/N and a high Curie temperature TC of 740 °C in (LiCeNd) codoped Na0.5Bi2.5Nb2O9 (NBN-LCN) ceramics. More encouragingly, the system has exceptional thermal stability and is nonsusceptible to mechanical loading. This study not only demonstrates that the high-performance and robust NBN-LCN high-temperature piezoceramics hold great potential for implements under harsh conditions but also opens an avenue for integrating antagonistic properties for the enhancement of the collective performance in functional materials.
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