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Design and Piezoelectric properties of 2-2 piezocomposite Ultrasonic Transducers by means of the Finite Element Methode  

Park, Jae-Sung (Dept. of Electronic & Information Engineering, YNC)
Lee, Sang-Wook (4D Culture, Co., Ltd.)
Publication Information
전자공학회논문지 IE / v.48, no.2, 2011 , pp. 40-46 More about this Journal
Abstract
In this study, PZT-5A green sheet were prepared by using tape casting technique, and the piezoelectric properties of PZT-5A by variation of sintering temperature was investigated. After, design and piezoelectric properties of 2-2 piezocomposite ultrasonic transducers by menas of the FEA. The acoustic impedance and piezoelectric charge constant of the 2-2 type piezocomposite transducer decreased proportionally due to the density decrease caused by the PZT volume fraction decrease. The piezocomposite acoustic impedance were 7~3 MRayl between 0.6 and 0.2 allowing it to be used for a ultrasonic transducer. The resonance characteristics and the electro-mechanical coupling factor were the best when the volume fraction PZT was 0.6. The PZT volume fraction shows the fixed value, 0.6~0.65, approximately within the range between 0.2 and 0.6 while it is increased to decreased over the range. The result of the experiment above confirmed that the 2-2 piezoelectric composites could be used as the ultrasonic transducers.
Keywords
Piezocomposite; Acoustic impedance; Electro-mechanical coupling factor; Finite element methode;
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