High-Frequency Ultrasonic Imaging with Lead-free (Na,K)(Nb,Ta)O3 Single Crystal

Zeyu Chen; Limei Zheng; Wenwu Cao; Xiaoyang Chen; Ruimin Chen; Runze Li; Kirk Shung; Qifa Zhou

doi:10.1177/0161734617701069

High-Frequency Ultrasonic Imaging with Lead-free (Na,K)(Nb,Ta)O₃ Single Crystal

Zeyu Chen, Limei Zheng, Wenwu Cao, Xiaoyang Chen, Ruimin Chen, Runze Li, Kirk Shung, Qifa Zhou

Research output: Contribution to journal › Article › peer-review

21 Scopus citations

Abstract

Lead-free (Na,K)(Nb,Ta)O₃ (KNNT) piezoelectric single crystal has been successfully grown using the top-seeded solution growth technique. The electromechanical coupling factors are very high (k₃₃ = 0.827, k_t = 0.646), and the dielectric loss tangent is as low as 0.004. Acoustic impedance was calculated to be 26.5 MRayl. From the single crystal, a single element transducer was fabricated. The transducer achieved a 57.6% '6 dB bandwidth and 32.3 μm axial resolution at the center frequency of 45.4 MHz, which can identify the cornea of porcine eyeball with high resolution. Comparison between KNNT single crystal and lead-based single crystal was discussed. The results suggest that this single crystal transducer is an excellent candidate to replace lead-containing transducer for high-frequency ultrasonic imaging applications.

Original language	English (US)
Pages (from-to)	348-356
Number of pages	9
Journal	Ultrasonic Imaging
Volume	39
Issue number	6
DOIs	https://doi.org/10.1177/0161734617701069
State	Published - Nov 1 2017

All Science Journal Classification (ASJC) codes

Radiological and Ultrasound Technology
Radiology Nuclear Medicine and imaging

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10.1177/0161734617701069

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title = "High-Frequency Ultrasonic Imaging with Lead-free (Na,K)(Nb,Ta)O3 Single Crystal",

abstract = "Lead-free (Na,K)(Nb,Ta)O3 (KNNT) piezoelectric single crystal has been successfully grown using the top-seeded solution growth technique. The electromechanical coupling factors are very high (k33 = 0.827, kt = 0.646), and the dielectric loss tangent is as low as 0.004. Acoustic impedance was calculated to be 26.5 MRayl. From the single crystal, a single element transducer was fabricated. The transducer achieved a 57.6% '6 dB bandwidth and 32.3 μm axial resolution at the center frequency of 45.4 MHz, which can identify the cornea of porcine eyeball with high resolution. Comparison between KNNT single crystal and lead-based single crystal was discussed. The results suggest that this single crystal transducer is an excellent candidate to replace lead-containing transducer for high-frequency ultrasonic imaging applications.",

author = "Zeyu Chen and Limei Zheng and Wenwu Cao and Xiaoyang Chen and Ruimin Chen and Runze Li and Kirk Shung and Qifa Zhou",

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T1 - High-Frequency Ultrasonic Imaging with Lead-free (Na,K)(Nb,Ta)O3 Single Crystal

AU - Chen, Zeyu

AU - Zheng, Limei

AU - Cao, Wenwu

AU - Chen, Xiaoyang

AU - Chen, Ruimin

AU - Li, Runze

AU - Shung, Kirk

AU - Zhou, Qifa

PY - 2017/11/1

Y1 - 2017/11/1

N2 - Lead-free (Na,K)(Nb,Ta)O3 (KNNT) piezoelectric single crystal has been successfully grown using the top-seeded solution growth technique. The electromechanical coupling factors are very high (k33 = 0.827, kt = 0.646), and the dielectric loss tangent is as low as 0.004. Acoustic impedance was calculated to be 26.5 MRayl. From the single crystal, a single element transducer was fabricated. The transducer achieved a 57.6% '6 dB bandwidth and 32.3 μm axial resolution at the center frequency of 45.4 MHz, which can identify the cornea of porcine eyeball with high resolution. Comparison between KNNT single crystal and lead-based single crystal was discussed. The results suggest that this single crystal transducer is an excellent candidate to replace lead-containing transducer for high-frequency ultrasonic imaging applications.

AB - Lead-free (Na,K)(Nb,Ta)O3 (KNNT) piezoelectric single crystal has been successfully grown using the top-seeded solution growth technique. The electromechanical coupling factors are very high (k33 = 0.827, kt = 0.646), and the dielectric loss tangent is as low as 0.004. Acoustic impedance was calculated to be 26.5 MRayl. From the single crystal, a single element transducer was fabricated. The transducer achieved a 57.6% '6 dB bandwidth and 32.3 μm axial resolution at the center frequency of 45.4 MHz, which can identify the cornea of porcine eyeball with high resolution. Comparison between KNNT single crystal and lead-based single crystal was discussed. The results suggest that this single crystal transducer is an excellent candidate to replace lead-containing transducer for high-frequency ultrasonic imaging applications.

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High-Frequency Ultrasonic Imaging with Lead-free (Na,K)(Nb,Ta)O₃ Single Crystal

Abstract

All Science Journal Classification (ASJC) codes

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