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http://dx.doi.org/10.4313/JKEM.2019.32.3.207

Fabrication and Performance Evaluation of Flat-Type Multilayer Piezoelectric Ceramic Ultrasonic Transmitter  

Na, Yong-hyeon (Optic & Electronic Materials & Component Center, Korea Institute of Ceramic Engineering and Technology)
Lee, Min-seon (Optic & Electronic Materials & Component Center, Korea Institute of Ceramic Engineering and Technology)
Cho, Jeong-ho (Optic & Electronic Materials & Component Center, Korea Institute of Ceramic Engineering and Technology)
Paik, Jong-hoo (Optic & Electronic Materials & Component Center, Korea Institute of Ceramic Engineering and Technology)
Lee, Jung Woo (Department of Materials Science and Engineering, Pusan National University)
Jeong, Young-hun (Optic & Electronic Materials & Component Center, Korea Institute of Ceramic Engineering and Technology)
Publication Information
Journal of the Korean Institute of Electrical and Electronic Material Engineers / v.32, no.3, 2019 , pp. 207-212 More about this Journal
Abstract
A flat-type piezoelectric ceramic ultrasonic transmitter was successfully fabricated for application in acoustic devices with cone-free diaphragms. The transmitter, possessing a center frequency of 40.6 kHz, exhibited a higher displacement characteristic for a multilayer type compared with a single layer type. Surface roughness treatment of an Al elastic diaphragm influenced a slight increase (1.1 dB) in the sound pressure level (SPL) at $10V_{rms}$ due to the enlarged surface area. The fabricated multilayer piezoelectric ceramic ultrasonic transmitter showed increasing SPL with increasing input voltage, with a maximum SPL of approximately 123.6 dB at $10V_{rms}$. This implies a doubly increased SPL density of $3.6dB/mm^3$, superior to that of a commercial open-type transmitter with a cone.
Keywords
Piezoelectric; Multilayer; Ultrasonic; Transmitter; Sound pressure level;
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