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231224s2016 xx |||||o 00| ||eng c |
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|a 10.1109/TUFFC.2016.2519348
|2 doi
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|a eng
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1 |
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|a Amini, Mohammad Hossein
|e verfasserin
|4 aut
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|a A New High-Temperature Ultrasonic Transducer for Continuous Inspection
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|c 2016
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|a ƒa Online-Ressource
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|a Date Completed 30.12.2016
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|a Date Revised 31.12.2016
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a A novel design of piezoelectric ultrasonic transducer is introduced, suitable for operation at temperatures of up to 700 °C-800 °C. Lithium niobate single crystal is chosen as the piezoelectric element primarily due to the high Curie temperature of 1200 °C. A backing element based on a porous ceramic is designed for which the pore volume fraction and average pore diameter in the ceramic matrix can be controlled in the manufacturing process; this enables the acoustic impedance and attenuation to be selected to match their optimal values as predicted by a one-dimensional transducer model of the entire transducer. Porous zirconia is selected as the ceramic matrix material of the backing element to obtain an ultrasonic signal with center frequency of 2.7-3 MHz, and 3-dB bandwidth of 90%-95% at the targeted operating temperature. Acoustic coupling of the piezocrystal to the backing element and matching layer is investigated using commercially available high-temperature adhesives and brazing alloys. The performance of the transducer as a function of temperature is studied. Stable bonding and clear signals were obtained using an aluminum brazing alloy as the bonding agent
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Oxides
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|a Niobium
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|a 05175J654G
|2 NLM
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|a lithium niobate
|2 NLM
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|a 12031-63-9
|2 NLM
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|a Sinclair, Anthony N
|e verfasserin
|4 aut
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1 |
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|a Coyle, Thomas W
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t IEEE transactions on ultrasonics, ferroelectrics, and frequency control
|d 1986
|g 63(2016), 3 vom: 01. März, Seite 448-55
|w (DE-627)NLM098181017
|x 1525-8955
|7 nnns
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| 773 |
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|g volume:63
|g year:2016
|g number:3
|g day:01
|g month:03
|g pages:448-55
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|u http://dx.doi.org/10.1109/TUFFC.2016.2519348
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