文献类型：期刊文献

英文题名：Influence of Spread Gap Height on Piezoelectric Transducer Coupled via Pressureless Sintering of Nano-Ag

作者：Gu, Yiqing[1];Wang, Mingyuan[1];Wang, Yue'e[1];Jia, Jiuhong[1];Tu, Shan-Tung[1]

机构：[1]East China Univ Sci & Technol, Minist Educ, Key Lab Pressure Syst & Safety, Shanghai 200237, Peoples R China

年份：2025

卷号：25

期号：17

起止页码：33473

外文期刊名：IEEE SENSORS JOURNAL

收录：;EI(收录号：20250617821098);WOS:【SCI-EXPANDED(收录号:WOS:001562587700003)】；

基金：This work was supported in part by the National Natural Science Foundation of China under Grant 52175138 and in part by the Soil-Transplanting Project of Xing Liao Talent Program under Grant XLYC2204030.

语种：英文

外文关键词：Couplings; Sensors; Piezoelectric transducers; Sintering; Blades; Bonding; Acoustics; Temperature measurement; Jamming; Temperature distribution; Nano-Ag; piezoelectric transducers; spread gap height; structural health monitoring

摘要：Spread gap height has a significant impact on the performance of piezoelectric transducers coupled by pressureless sintering of nano-Ag paste, but the specific mechanism of the effect has been lacking of systematic investigation. In this work, the effect of spread gap height on the preparation process and post-preparation performance of the nano-Ag coupled transducer is experimentally explored. Surface mount technology (SMT) stencils with various thicknesses are used to simulate different gap heights. The results show that mechanical jamming and cohesion-induced jamming coexist during the paste spreading process. Gap height is positively correlated with layer spreadability. When the spread gap height is narrow, limited spreadability and coupling layer flatness lead to suboptimal performance in transducer with the thinnest coupling layer. Conversely, a larger gap height results in a thicker coupling layer, which increases scattering and attenuation coefficients, thereby weakening the signal. Excellent transducer performance is obtained at a moderate gap height (about 50 mu m).