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ICSV28_219.pdf | 862.94 kB | Adobe PDF | 見る/開く |
タイトル: | Ultrasonic characterization of alumina/silicone-rubber composites for acoustical applications |
著者: | Biwa, Shiro Iwasaki, Hideyasu |
著者名の別形: | 琵琶, 志朗 |
キーワード: | ultrasonic waves acoustic lens silicone rubber composite materials sound velocity |
発行日: | 2022 |
出版者: | Society of Acoustics, Singapore |
誌名: | The 28th International Congress on Sound and Vibration (ICSV28) |
論文番号: | 219 |
抄録: | Silicone rubber has been used commonly as a material for an acoustic lens in medical ultrasonic probes. In order to achieve the desired properties for an acoustic lens, i.e., acoustic impedance close that of, and wave velocity lower than that of, human body, different materials have been considered as fillers or dopants to be dispersed in silicone rubber. A micromechanics-based analysis has revealed that silicone-rubber composites can have the desired acoustical properties with a certainamount of dispersed alumina particles. In this study, the ultrasonic wave propagation characteristics of alumina-particle-dispersed silicone-rubber composites fabricated with different particle concentrations and average particle radii were investigated experimentally. Namely, the velocity and attenuation coefficient of longitudinal wave in the alumina/silicone-rubber composites were evaluated at the frequency of 5 MHz by the spectral analysis of the reflected waves obtained in the immersion measurement. The experimental results have shown that the acoustic impedance and the wave velocity desired for an acoustic lens can be achieved by the alumina particle concentration as predicted by the micromechanics-based analysis. The influence of the particle radius on the acoustical properties of the composite has also been examined. |
記述: | ICSV28 Local Committee in Singapore, July 24-28, 2022 |
著作権等: | © International Institute of Acoustics and Vibration (IIAV), 2022 This article is deposited under the publisher's permission. 発行元の許可を得て登録しています. |
URI: | http://hdl.handle.net/2433/287764 |
関連リンク: | https://www.iiav.org/content/archives_icsv_last/2022_icsv28/index2c15.html?va=viewpage&vaid=403 |
出現コレクション: | 学術雑誌掲載論文等 |
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