Electro-elastic characteristics of KCsMoP2O9 crystal: Exploiting strong piezoelectricity for guided wave transducer applications

IF 8.4 1区材料科学 Q1 CHEMISTRY, PHYSICAL Journal of Materiomics Pub Date : 2024-02-09 DOI:10.1016/j.jmat.2024.01.011

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Abstract

A new piezoelectric crystal, KCsMoP₂O₉ (KCMP), was successfully grown by the Kyropoulos method. The electro-elastic properties of KCMP crystal were characterized by the impedance method. The full set of elastic constants was determined by solving the Christoffel equation. Remarkably, the crystal exhibits a large face-shear piezoelectric coefficient of d₁₄ = 16.2 pC/N, surpassing that of the extensively studied ordered langasite crystal Ca₃TaGa₃Si₂O₁₄ (d₁₄ = 10.4 pC/N). A fundamental shear horizontal (SH₀) wave piezoelectric transducer was developed, leveraging the face-shear-mode of KCMP wafers. Finite element simulations have conclusively demonstrated the KCMP-based transducer's exceptional ability to efficiently excite and capture the pure SH₀ wave, independently along two orthogonal main directions (0°/180° and 90°/270°). These results were subsequently corroborated through experimental validation at temperatures up to 300 °C, highlighting the considerable promise of KCMP crystals for utilization in non-destructive testing and structural health monitoring applications.

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KCsMoP2O9 晶体的电弹性特性：利用强压电性实现导波换能器应用

利用 Kyropoulos 法成功生长出了一种新型压电晶体 KCsMoP2O9（KCMP）。KCMP 晶体的电弹性特性由阻抗法表征。通过求解克里斯托弗方程，确定了全套弹性常数。值得注意的是，该晶体表现出很大的面剪切压电系数 d14 = 16.2 pC/N，超过了广泛研究的有序长石晶体 Ca3TaGa3Si2O14（d14 = 10.4 pC/N）。利用 KCMP 晶圆的面剪切模式，开发了一种基本水平剪切（SH0）波压电传感器。有限元模拟确证了基于 KCMP 的换能器在两个正交主要方向（0°/180° 和 90°/270°）上有效激发和捕捉纯 SH0 波的卓越能力。随后，这些结果在高达 300 °C 的温度下得到了实验验证的证实，凸显了 KCMP 晶体在无损检测和结构健康监测应用中的巨大潜力。

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来源期刊

Journal of Materiomics Materials Science-Metals and Alloys

CiteScore

14.30

自引率

6.40%

发文量

331

审稿时长

37 days

期刊介绍： The Journal of Materiomics is a peer-reviewed open-access journal that aims to serve as a forum for the continuous dissemination of research within the field of materials science. It particularly emphasizes systematic studies on the relationships between composition, processing, structure, property, and performance of advanced materials. The journal is supported by the Chinese Ceramic Society and is indexed in SCIE and Scopus. It is commonly referred to as J Materiomics.