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Author Morris, R.H. ♦ Newton, M.I. ♦ Roach, P. ♦ Doy, N. ♦ Evans, C.R. ♦ Atherton, S. ♦ McHale, G.
Source IEEE Xplore Digital Library
Content type Text
Publisher Institute of Electrical and Electronics Engineers, Inc. (IEEE)
File Format PDF
Copyright Year ©2009
Language English
Subject Domain (in DDC) Technology ♦ Engineering & allied operations ♦ Applied physics
Subject Keyword Surface acoustic waves ♦ Acoustic waves ♦ Acoustic sensors ♦ Temperature sensors ♦ Surface acoustic wave devices ♦ Delay lines ♦ Acoustic measurements ♦ Liquids ♦ Polymers ♦ Resonance
Abstract The use of acoustic wave sensors for industrial applications is widespread. At present there are few sensors for assessing fluid properties which are capable of operating at temperatures in excess of 500°C. In this work we present surface acoustic wave devices fabricated on Langasite substrates as possible candidates for such sensors. Two port delay line devices are produced and investigated in terms of temperature and their ability to measure viscosity-density properties of liquids. Single port resonator devices are fabricated and a polymer guiding layer applied to enhance sensitivity. A sharp resonance is seen for a guiding layer thickness of 4.2µm and the mass sensitivity is assessed by depositing layers of gold onto its surface. This sensitivity is found to 749 $Hz·ng^{−1}·cm^{−2}$ which is several orders of magnitude higher that that for a thickness shear mode device produced on the same substrate. By further developing these devices with particular focus on the reflector arrangement on the single port resonator devices, highly sensitive sensors for temperatures in excess of 900°C may be produced which will be suitable for use with automated data processing.
Description Author affiliation: School of Science and Technology, Nottingham Trent University, NG11 8NS, UK (Morris, R.H.; Newton, M.I.; Roach, P.; Doy, N.; Evans, C.R.; Atherton, S.; McHale, G.)
ISBN 9781424435111
ISSN 10756787
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research ♦ Reading
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2009-04-20
Publisher Place France
Rights Holder Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Size (in Bytes) 446.98 kB
Page Count 3
Starting Page 245
Ending Page 247

Source: IEEE Xplore Digital Library