使用BZT-50BCT陶瓷的无铅血管内超声换能器。
Lead-free intravascular ultrasound transducer using BZT-50BCT ceramics.
作者信息
Yan Xingwei, Lam Kwok Ho, Li Xiang, Chen Ruimin, Ren Wei, Ren Xiaobing, Zhou Qifa, Shung K Kirk
出版信息
IEEE Trans Ultrason Ferroelectr Freq Control. 2013 Jun;60(6):1272-6. doi: 10.1109/TUFFC.2013.2692.
This paper reports the fabrication and evaluation of a high-frequency ultrasonic transducer based on a new lead-free piezoelectric material for intravascular imaging application. Lead-free 0.5Ba(Zr0.2Ti0.8)O3-0.5(Ba0.7Ca0.3)TiO4(BZT-50BCT) ceramic with a high dielectric constant (2800) was employed to develop a high-frequency (30 MHz) needle-type ultrasonic transducer. With superior piezoelectric performance (piezoelectric coefficient d33 ~ 600 pC/N), the lead-free transducer was found to exhibit a -6-dB bandwidth of 53% with an insertion loss of 18.7 dB. In vitro intravascular ultrasound (IVUS) imaging of a human cadaver coronary artery was performed to demonstrate the potential of the lead-free transducer for biomedical imaging applications. This is the first time that a lead-free transducer has been used for IVUS imaging application. The experimental results suggest that the BZT-50BCT ceramic is a promising lead-free piezoelectric material for high-frequency intravascular imaging applications.
本文报道了一种基于新型无铅压电材料的高频超声换能器的制备与评估，该换能器用于血管内成像应用。采用具有高介电常数（约2800）的无铅0.5Ba(Zr0.2Ti0.8)O3-0.5(Ba0.7Ca0.3)TiO4（BZT-50BCT）陶瓷研制了一种高频（约30 MHz）针型超声换能器。该无铅换能器具有优异的压电性能（压电系数d33约为600 pC/N），其-6-dB带宽为53%，插入损耗为18.7 dB。对人体尸体冠状动脉进行了体外血管内超声（IVUS）成像，以证明该无铅换能器在生物医学成像应用中的潜力。这是首次将无铅换能器用于IVUS成像应用。实验结果表明，BZT-50BCT陶瓷是一种有前途的用于高频血管内成像应用的无铅压电材料。
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