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Title: Ultrasonic transducer

Abstract

An ultrasonic transducer having an effective center frequency of about 42 MHz; a bandwidth of greater than 85% at 6 dB; a spherical focus of at least 0.5 inches in water; an F4 lens; a resolution sufficient to be able to detect and separate a 0.005 inch flat-bottomed hole at 0.005 inches below surface; and a beam size of approximately 0.006–0.008 inches measured off a 11/2 mm ball in water at the transducer's focal point.

Inventors:
;
Publication Date:
Research Org.:
Idaho National Lab. (INL), Idaho Falls, ID (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1176138
Patent Number(s):
7,188,526
Application Number:
11/172,129
Assignee:
Battelle Energy Alliance, LLC (Idaho Falls, ID) INL
DOE Contract Number:
AC07-05ID14517
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION; 42 ENGINEERING

Citation Formats

Taylor, Steven C., and Kraft, Nancy C. Ultrasonic transducer. United States: N. p., 2007. Web.
Taylor, Steven C., & Kraft, Nancy C. Ultrasonic transducer. United States.
Taylor, Steven C., and Kraft, Nancy C. Tue . "Ultrasonic transducer". United States. doi:. https://www.osti.gov/servlets/purl/1176138.
@article{osti_1176138,
title = {Ultrasonic transducer},
author = {Taylor, Steven C. and Kraft, Nancy C.},
abstractNote = {An ultrasonic transducer having an effective center frequency of about 42 MHz; a bandwidth of greater than 85% at 6 dB; a spherical focus of at least 0.5 inches in water; an F4 lens; a resolution sufficient to be able to detect and separate a 0.005 inch flat-bottomed hole at 0.005 inches below surface; and a beam size of approximately 0.006–0.008 inches measured off a 11/2 mm ball in water at the transducer's focal point.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Mar 13 00:00:00 EDT 2007},
month = {Tue Mar 13 00:00:00 EDT 2007}
}

Patent:

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  • An ultrasonic transducer is formed as a diffusion bonded assembly of piezoelectric crystal, backing material, and, optionally, a ceramic wear surface. The mating surfaces of each component are silver films that are diffusion bonded together under the application of pressure and heat. Each mating surface may also be coated with a reactive metal, such as hafnium, to increase the adhesion of the silver films to the component surfaces. Only thin silver films are deposited, e.g., a thickness of about 0.00635 mm, to form a substantially non-compliant bond between surfaces. The resulting transducer assembly is substantially free of self-resonances over normalmore » operating ranges for taking resonant ultrasound measurements. 12 figs.« less
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