文献类型：期刊文献

英文题名：Effect of the paste spreadability on ultrasonic transducer fabricated by pressureless sintering of nano-Ag

作者：Gu, Yiqing[1];Wang, Mingyuan[1];Hou, Zhaoqi[2];Jia, Jiuhong[1];Tu, Shan-Tung[1]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Minist Educ, Key Lab Pressure Syst & Safety, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Nanjing Univ Sci & Technol, Coll Mech Engn, 200 Xiaolingwei St, Nanjing 210094, Peoples R China

年份：2024

卷号：236

外文期刊名：MEASUREMENT

收录：;EI(收录号：20242416249809);WOS:【SCI-EXPANDED(收录号:WOS:001253193600001)】；

基金：The authors are grateful to the National Natural Science Foundation of China (Grant No. 52175138) for the financial support of this work. The first author is thankful to Professor Wenguang Nan, Nanjing Tech University, China, for the inspiration and encouragement on this work.

语种：英文

外文关键词：Ultrasonic transducer; Nano-Ag coupled; Sound attenuation; Structural Health Monitoring (SHM)

摘要：Paste spreadability is critical to paste spread layer and thus the quality of final product in pressureless sintering of nano-Ag, but the metrics and the underlying mechanics have not yet been well acknowledged. In this work, various ultrasonic transducers are fabricated by pressureless sintering of various nano-Ag pastes. Particle dynamics mechanism during the paste spreading process and the relationship between paste viscosity and spreadability are clarified. The influences of paste spreadability on dynamic performances of transducer are analysed, and the underlying mechanisms are also investigated. The results show that the normalized mass of Ag NPs is basically positively correlated with the flatness of the coupling layer, and the flatness of the coupling layer is also positively correlated with the peak-to-peak voltage and SNR of the transducer. The attenuation in the farfield scattering process mainly depends on the porosity of the coupling layer.