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Longitudinal and Shear Wave Propagation in Silica Aerogels at Ultrasonic Frequencies

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dc.creator Gómez Álvarez-Arenas, Tomás
dc.date 2008-06-09T12:20:01Z
dc.date 2008-06-09T12:20:01Z
dc.date 2002-09
dc.date.accessioned 2017-01-31T01:36:58Z
dc.date.available 2017-01-31T01:36:58Z
dc.identifier Forum Acusticum. Sevilla, sep. 2002
dc.identifier http://hdl.handle.net/10261/4913
dc.identifier.uri http://dspace.mediu.edu.my:8181/xmlui/handle/10261/4913
dc.description PACS Reference: 43.35.Cg, 43.35.Mr, 43.35.Yb, 43.20.Ks
dc.description In this work, the possibility to use a technique based on the analysis of thickness resonances of air-surrounded aerogel plates at ultrasonic frequencies to obtain its viscoelastic properties is investigated. These resonances were excited and sensed by airborne ultrasonic waves. To this purpose, specially designed air-coupled, high-sensitivity and broad-band piezoelectric transducers were used. Precise and simultaneous measurements of velocity and attenuation of longitudinal and shear waves at different frequencies as well as aerogel density were obtained. It allowed to afford for the first time, a full characterisation of the viscoeleastic properties of these materials at ultrasonic frequencies.
dc.description Peer reviewed
dc.format 96066 bytes
dc.format application/pdf
dc.language eng
dc.publisher Sociedad Española de Acústica
dc.rights openAccess
dc.subject Aerogels
dc.subject Viscoelastic properties
dc.subject Ultrasonic frequencies
dc.subject Piezoelectric transducers
dc.subject Longitudinal waves
dc.subject Shear waves
dc.subject Velocity of propagation
dc.subject Attenuation
dc.title Longitudinal and Shear Wave Propagation in Silica Aerogels at Ultrasonic Frequencies
dc.type Comunicación de congreso

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