Ultrahigh temperature stability in heterovalent-ion doped PZT ceramics

IF 5.8 2区 材料科学 Q2 CHEMISTRY, PHYSICAL Journal of Alloys and Compounds Pub Date : 2024-11-20 DOI:10.1016/j.jallcom.2024.177686
Hong Liu, Wanfeng Zhuang, Ning Chen, Hao Chen, Weiling Wang, Jie Xing, Jianguo Zhu
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Abstract

We achieved ultrahigh temperature stability of the piezoelectric coefficient d33 by doping heterovalent ions in the PbZr0.54Ti0.46O3 ceramics at the A/B sites in the ABO3 lattice. The Sm3+-ion amount at the A-site remains constant, while the Ta5+-ion amount at the B-site changes. We utilized electron paramagnetic resonance (EPR) and X-ray photoelectron spectroscopy (XPS) to investigate the reduction of oxygen vacancies, which are closely associated with the defect dipoles formed by heterovalent doping. We utilized piezoresponse force microscopy (PFM), temperature-dependent X-ray diffraction (XRD) combined with Rietveld refinement, and temperature-dependent Raman spectroscopy to understand the mechanism of the temperature stability of the piezoelectric coefficient d33. When x=0.01, the performance of xTa-0.01Sm-PbZr0.54Ti0.46O3 ceramic is optimal: d33=530 pC/N, electromechanical coupling factor kp=0.72, Curie temperature TC =343 °C, where the temperature stability of the piezoelectric coefficient is ultrahigh, and the d33 changes only 2.2% over the 25−200 °C temperature range.
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掺杂异价离子的 PZT 陶瓷的超高温稳定性
我们通过在 PbZr0.54Ti0.46O3 陶瓷的 ABO3 晶格 A/B 位上掺杂异价离子,实现了压电系数 d33 的超高温稳定性。A 位上的 Sm3+ 离子含量保持不变,而 B 位上的 Ta5+ 离子含量则发生了变化。我们利用电子顺磁共振(EPR)和 X 射线光电子能谱(XPS)研究了氧空位的减少,这与异价掺杂形成的缺陷偶极子密切相关。我们利用压电响应力显微镜 (PFM)、与温度相关的 X 射线衍射 (XRD) 结合里特维尔德精炼以及与温度相关的拉曼光谱来了解压电系数 d33 温度稳定性的机理。当 x=0.01 时,xTa-0.01Sm-PbZr0.54Ti0.46O3 陶瓷的性能达到最佳:d33=530 pC/N,机电耦合系数 kp=0.72,居里温度 TC =343 ℃,其中压电系数的温度稳定性超高,在 25-200 ℃ 的温度范围内,d33 仅变化 2.2%。
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来源期刊
Journal of Alloys and Compounds
Journal of Alloys and Compounds 工程技术-材料科学:综合
CiteScore
11.10
自引率
14.50%
发文量
5146
审稿时长
67 days
期刊介绍: The Journal of Alloys and Compounds is intended to serve as an international medium for the publication of work on solid materials comprising compounds as well as alloys. Its great strength lies in the diversity of discipline which it encompasses, drawing together results from materials science, solid-state chemistry and physics.
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