Title :
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
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;
Conference_Titel :
Ultrasonics Symposium, 2007. IEEE
Conference_Location :
New York, NY
Print_ISBN :
978-1-4244-1384-3
Electronic_ISBN :
1051-0117
DOI :
10.1109/ULTSYM.2007.482
