P3K-2 Fabrication and Characterization of Nanocrystalline TiO2-Polymer Composite Matching Layers

Author

Zhu, J. ; Cao, W. ; Jiang, B. ; Zhang, D.S. ; Zheng, H. ; Zhou, Q. ; Shung, K.K.

Author_Institution

Pennsylvania State Univ., University Park

fYear

2007

fDate

28-31 Oct. 2007

Firstpage

1917

Lastpage

1920

Abstract

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 ~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.

Keywords

acoustic impedance; annealing; biomedical transducers; nanocomposites; polymers; titanium compounds; ultrasonic measurement; ultrasonic transducers; ultrasonic velocity measurement; TiO₂; acoustic impedance; annealing; composite thin film; epoxy resin; high volume particle loading; nanocrystalline composite matching layers; polymer composites; size 25 nm; ultra high frequency medical ultrasonic transducers; ultrasonic spectroscopy methods; Acoustic measurements; Biomedical acoustics; Epoxy resins; Fabrication; Frequency; Impedance; Spectroscopy; UHF measurements; Ultrasonic transducers; Ultrasonic variables measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 2007. IEEE

Conference_Location

New York, NY

ISSN

1051-0117

Print_ISBN

978-1-4244-1384-3

Electronic_ISBN

1051-0117

Type

conf

DOI

10.1109/ULTSYM.2007.482

Filename

4410055