Forty-channel phased array ultrasonic probe using 0.91Pb(Zn1/3Nb2/3)O3-0.09PbTiO3 single crystal

被引：25

作者：

Saitoh, S ^{[1
]}

Kobayashi, T ^{[1
]}

Harada, K ^{[1
]}

Shimanuki, S ^{[1
]}

Yamashita, Y ^{[1
]}

机构：

[1] Toshiba Corp, Res & Dev Ctr, Mat & Devices Res Labs, Kawasaki, Kanagawa 2108582, Japan

来源：

IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL | 1999年 / 46卷 / 01期

关键词：

D O I：

10.1109/58.741526

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

A 0.91Pb(Zn1/3Nb2/3)O-3-0.09PbTiO(3) (PZN-PT) single crystal with high electromechanical coupling factor (k(33)) > 90% has been used to fabricate a 40-channel phased array ultrasonic probe with greater sensitivity and broader bandwidth than conventional probes. This probe has a center frequency of 3.5 MHz and an aperture of about 6.0 x 7.5 mm. The standard probe fabrication process was modified for PZN-PT. The dispersion of echo signals was within +/- 20% of the mean value. After recovery poling, the echo amplitude of the PZN-PT single-crystal probe is 8 and 5 dB higher than that of one- and two-matching-layer PZT probes, respectively. Moreover, the fractional bandwidth of the single-matching-layer PZN-PT probe is broader than that of the two-matching-layer PZT probes. The PZN-PT single crystals provide great improvements in the sensitivity and bandwidth of phased array probes.

引用

页码：152 / 157

页数：6

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