High frequency transducer for vessel imaging based on lead-free Mn-doped (K0.44Na0.56)NbO3 single crystal
High frequency transducer for vessel imaging based on lead-free Mn-doped (K0.44Na0.56)NbO3 single crystal
复制标题
基于无铅掺锰(K0.44Na0.56)NbO3单晶的血管成像高频换能器
DOI：
10.1063/1.4990072
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发表时间：
2017-08-28
影响因子：
4
通讯作者：
Fang, Bijun
中科院分区：
文献类型：
--
作者：
Ma, Jinpeng;Xue, Saidong;Fang, Bijun
本文报道了一种基于无铅（K0.44Na0.56）NbO_3 - 0.5mol. % Mn（Mn-KNN）单晶，其具有0.64的高机电耦合系数k（t）和3210 kHz的大厚度频率常数N-t。利用Krimholtz、Leedom和Mattaei（KLM）等效电路模型结合PiezoCAD软件来模拟和优化脉冲回波响应。理论上，在中心频率为50.47MHz和优化匹配条件下，获得了74.94%的-6dB带宽。实验结果表明，中心频率为51.8MHz，-6dB带宽为70.2%。这种无铅单晶换能器具有优异的综合性能，在环境友好型血管成像换能器中具有很大的潜力。出版社：AIP Publishing
We report a high frequency ultrasonic transducer up to 50MHz for vessel imaging based on a lead-free (K0.44Na0.56)NbO3-0.5 mol. % Mn (Mn-KNN) single crystal, which has a high electromechanical coupling coefficient k(t) of 0.64 and a large thickness frequency constant N-t of 3210 kHz . mm. The Krimholtz, Leedom, and Mattaei (KLM) equivalent circuit model was utilized to simulate and optimize the pulse-echo response combined with PiezoCAD software. Theoretically, a high -6 dB bandwidth of 74.94% was obtained at a center frequency of 50.47MHz and optimized matching conditions. The experimental results showed a center frequency of 51.8 MHz with a -6 dB bandwidth of 70.2%. The excellent global performance makes this lead-free single-crystal transducer quite potential in an environmentally friendly vessel imaging transducer. Published by AIP Publishing.