Fabrication and characterization of nanocrystalline TiO2-polymer composite matching layers

被引：0
|
作者：
Zhu, J. [1 ]
Cao, W. [1 ]
Jiang, B. [1 ]
Zhang, D. S. [2 ]
Zheng, H. [2 ]
Zhou, Q. [3 ]
Shung, K. K. [3 ]
机构：
[1] Penn State Univ, Mat Res Inst, University Pk, PA 16802 USA
[2] Chemat Technol Inc, Northridge, CA 91324 USA
[3] Univ Southern Calif, NIH Resource Med Ultrason Transducer Technol, Dept Biomed Engn, Los Angeles, CA 90089 USA
来源：
2007 IEEE ULTRASONICS SYMPOSIUM PROCEEDINGS, VOLS 1-6 | 2007年
关键词：
D O I：
10.1109/ULTSYM.2007.482
中图分类号：
O42 [声学];
学科分类号：
070206 ; 082403 ;
摘要：
A new nanocrystalline TiO2-Polymer composite with high volume particle loading has been developed for matching layers of ultra high frequency medical ultrasonic transducers. The composite consists of 25 nm size TiO2 particles and Epoxy resin with the acoustic impedance reaching as high as 7.19 MRayls. Ultrasonic spectroscopy methods are used to measure the ultrasonic velocity of the composite thin film with thickness similar to 8 microns. It is found that the acoustic impedance can be increased by annealing the composite at higher temperatures. Our measured results show that this new composite has good acoustic impedance characteristics that are needed for matching layers of ultra-high frequency transducers.
引用
收藏
页码：1917 / +
页数：2
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