Performance of a high dielectric constant piezoelectric ceramic for ultrasound transducers

被引：0

作者：

Ritter, T ^{[1
]}

Shung, KK ^{[1
]}

Hackenberger, WS ^{[1
]}

Wang, HF ^{[1
]}

Shrout, TR ^{[1
]}

机构：

[1] Penn State Univ, Bioengn Program, NIH Resource Ctr Med Ultrason Transducer Technol, University Pk, PA 16802 USA

来源：

1999 IEEE ULTRASONICS SYMPOSIUM PROCEEDINGS, VOLS 1 AND 2 | 1999年

关键词：

D O I：

暂无

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

A high dielectric material suitable for medical imaging arrays has been investigated. Resonance techniques were used to characterize the complete set of electromechanical properties. Compared to Navy Type VI material a two-fold increase in clamped permittivity was observed (epsilon(33)(S)/epsilon(0) of 2730 vs 1470), while the coupling coefficient for linear array elements was almost identical (k(33)' of 0.68 vs 0.69 for Navy Type VI). Measurements indicated high coupling and permittivity at frequencies up to at least 60 MHz. Models for 1-3 composites incorporating this material revealed an effective thickness coupling of 0.68 at a 55% volume fraction of ceramic. Simulated device performance indicated a 4dB sensitivity increase for array elements incorporating this material when compared to conventional materials.

引用

页码：1295 / 1298

页数：4

共 11 条

[1]

Auld B.A., 1973, ACOUSTIC FIELDS WAVE

[2]

DESILETS CS, 1978, 2833 GL EL GINZT LAB

[3] SIMPLIFIED METHOD FOR DETERMINING PIEZOELECTRIC CONSTANTS FOR THICKNESS MODE TRANSDUCERS [J].