Characteristics of Ultrasonic Delay Lines Using Quartz and Barium Titanate Ceramic Transducers
作者:
John E. May,
期刊:
The Journal of the Acoustical Society of America
(AIP Available online 1954)
卷期:
Volume 26,
issue 3
页码: 347-355
ISSN:0001-4966
年代: 1954
DOI:10.1121/1.1907340
出版商: Acoustical Society of America
数据来源: AIP
摘要:
Previous analysis of the equivalent circuit for the ultrasonic delay line was applied to quartz crystal transducers and a vitreous silica delay medium. The analysis has been extended to evaluate the use of other materials such as magnesium, aluminum, and steel, and to includeBaTiO3ceramic transducers. Calculations show the decrease in loss to be expected as the impedance of the delay medium is decreased and conversely the increase in band width to be expected as the impedance of the delay medium is increased. The increase in band width resulting from symmetrical loading of the transducers is also evaluated. Modifications to the equivalent circuits for the case ofBaTiO3ceramic transducers are considered. Theoretically losses can be reduced to 10 db or less using the ceramic transducers with a vitreous silica medium. The band width is slightly less than for quartz crystal transducers. However, by utilizing higher impedance materials, band widths approaching 100 percent should be achieved.
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