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Title: Bonded ultrasonic transducer and method for making

Abstract

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 normal operating ranges for taking resonant ultrasound measurements. 12 figs.

Inventors:
; ;
Issue Date:
Research Org.:
University of California
OSTI Identifier:
131912
Patent Number(s):
5,465,897
Application Number:
PAN: 8-220,306
Assignee:
Univ. of California, Office of Technology Transfer, Alameda, CA (United States)
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 14 Nov 1995
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; ULTRASONIC TESTING; TRANSDUCERS; DESIGN; PIEZOELECTRICITY; FABRICATION

Citation Formats

Dixon, R D, Roe, L H, and Migliori, A. Bonded ultrasonic transducer and method for making. United States: N. p., 1995. Web.
Dixon, R D, Roe, L H, & Migliori, A. Bonded ultrasonic transducer and method for making. United States.
Dixon, R D, Roe, L H, and Migliori, A. Tue . "Bonded ultrasonic transducer and method for making". United States.
@article{osti_131912,
title = {Bonded ultrasonic transducer and method for making},
author = {Dixon, R D and Roe, L H and Migliori, A},
abstractNote = {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 normal operating ranges for taking resonant ultrasound measurements. 12 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1995},
month = {11}
}