High frequency properties of passive materials for ultrasonic transducers

被引：135

作者：

Wang, HF

Ritter, T

Cao, WW ^{[1
]}

Shung, KK

机构：

[1] Penn State Univ, Mat Res Lab, University Pk, PA 16802 USA

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

来源：

IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL | 2001年 / 48卷 / 01期

关键词：

D O I：

10.1109/58.895911

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

The acoustic properties of passive materials for ultrasonic transducers have been measured at room temperature in the frequency range from 25 to 65 MHz using ultrasonic spectroscopy. These materials include alumina/EPO-TEK 301 composites and tungsten/EPO-TEK 301 composites. Experimental results showed that the acoustic impedance of the composites monotonically increased with the volume fraction of the particle filler, which is in agreement with the Denavey model. The attenuation, however, peaked between 7 and 9% volume fraction of particle filler. Far comparison, several other passive materials were also fabricated and measured. The results suggest that materials that possess a higher attenuation also appear to have a larger velocity dispersion.

引用

页码：78 / 84

页数：7

共 13 条

[1] EFFECTIVE ELASTIC PARAMETERS OF RANDOM COMPOSITES [J].