基于 BZT-BCT 陶瓷的无铅 A/E 传感器。

Lead-Free AE Sensor Based on BZT-BCT Ceramics.

机构信息

Energy Conversion Research Center, Korea Electrotechnology Research Institute (KERI), Changwon 51543, Korea.

School of Materials Science and Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Korea.

出版信息

Sensors (Basel). 2021 Oct 26;21(21):7100. doi: 10.3390/s21217100.

DOI:10.3390/s21217100

PMID:34770404

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8588008/

Abstract

In this study, an acoustic emission (AE) sensor was fabricated using lead-free Ba(ZrTi)O-0.5(BaCa)TiO (BZT-BCT) ceramics. The acoustic and electromechanical properties of the AE sensor were determined by the shapes of the piezoelectric ceramics. To optimize the AE sensor performance, the shapes of the ceramics were designed according to various diameter/thickness ratios (D/T) = 0.5, 1.0, 1.5, 2.0, 2.5, 3.0. The BZT-BCT ceramic with D/T = 1.0 exhibited excellent values of a piezoelectric charge coefficient (), piezoelectric voltage coefficient (), and electromechanical coupling factor (), which were 370 (pC/N), 11.3 (10 Vm/N), and 0.58, respectively. Optimum values of resonant frequency () = 172.724 (kHz), anti-resonant frequency () = 196.067 (kHz), and effective electromechanical coupling factor () = 0.473 were obtained for the manufactured BZT-BCT ceramic with D/T = 1.0. The maximum sensitivity and frequency of the AE sensor made of the BZT-BCT ceramic with a D/T ratio of 1.0 were 65 dB and 30 kHz, respectively.

摘要

在这项研究中，使用无铅 Ba(ZrTi)O-0.5(BaCa)TiO (BZT-BCT) 陶瓷制造了声发射 (AE) 传感器。AE 传感器的声和机电性能由压电陶瓷的形状决定。为了优化 AE 传感器的性能，根据各种直径/厚度比 (D/T) = 0.5、1.0、1.5、2.0、2.5、3.0 来设计陶瓷的形状。D/T = 1.0 的 BZT-BCT 陶瓷表现出优异的压电电荷系数 ()、压电电压系数 () 和机电耦合系数 () 值，分别为 370 (pC/N)、11.3 (10 Vm/N) 和 0.58。对于制造的 D/T = 1.0 的 BZT-BCT 陶瓷，获得了最佳的谐振频率 () = 172.724 (kHz)、反谐振频率 () = 196.067 (kHz) 和有效机电耦合系数 () = 0.473。D/T 比为 1.0 的 BZT-BCT 陶瓷制成的 AE 传感器的最大灵敏度和频率分别为 65 dB 和 30 kHz。