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Title: Means and method for nonuniform poling of piezoelectric transducers

Abstract

An apparatus and method for nonuniform poling of piezoelectric transducers includes machining one or more indentation into an end of a piezoelectric rod and cutting the rod to present a thickened disk shape. Highly electrically conductive material is deposited on at least the indentations in the one end and on at least portions of the opposite face of the member. One or more electrodes are configured to matingly fit within the indentations on the one face of the disk, with a like number of electrodes being positionable on the opposite face of the material. Electrical power is then applied to the electrodes in desired amounts, polarity, and duration. The indentations vary the electrical field produced within the piezoelectric material to produce nonuniform poling in the material. The thick disk is then cut to remove the indentations and to present a thin, flat two sided disk for installation in a conventional piezoelectric transducer probe. The indentations are selected to produce poling in accordance with desired transducer response profiles such as Gaussian or Bessel functions.

Inventors:
 [1];  [1];  [1];  [1];  [1];  [1]
  1. (Ames, IA)
Issue Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA; Iowa State University, Ames, IA (US)
OSTI Identifier:
867548
Patent Number(s):
4961252
Application Number:
07/447,831
Assignee:
Iowa State University Research Foundation, Inc. (Ames, IA) AMES
DOE Contract Number:  
W-7405-ENG-82
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
means; method; nonuniform; poling; piezoelectric; transducers; apparatus; machining; indentation; rod; cutting; thickened; disk; shape; highly; electrically; conductive; material; deposited; indentations; portions; opposite; electrodes; configured; matingly; fit; positionable; electrical; power; applied; desired; amounts; polarity; duration; vary; field; produced; produce; thick; cut; remove; flat; sided; installation; conventional; transducer; probe; selected; accordance; response; profiles; gaussian; bessel; functions; electrical field; field produced; electrical power; conductive material; electrically conductive; piezoelectric transducer; piezoelectric material; nonuniform poling; desired amount; piezoelectric transducers; desired amounts; highly electrically; /29/264/310/

Citation Formats

Hsu, David K., Margetan, Frank J., Hasselbusch, Michael D., Wormley, Samuel J., Hughes, Michael S., and Thompson, Donald O. Means and method for nonuniform poling of piezoelectric transducers. United States: N. p., 1990. Web.
Hsu, David K., Margetan, Frank J., Hasselbusch, Michael D., Wormley, Samuel J., Hughes, Michael S., & Thompson, Donald O. Means and method for nonuniform poling of piezoelectric transducers. United States.
Hsu, David K., Margetan, Frank J., Hasselbusch, Michael D., Wormley, Samuel J., Hughes, Michael S., and Thompson, Donald O. Tue . "Means and method for nonuniform poling of piezoelectric transducers". United States. https://www.osti.gov/servlets/purl/867548.
@article{osti_867548,
title = {Means and method for nonuniform poling of piezoelectric transducers},
author = {Hsu, David K. and Margetan, Frank J. and Hasselbusch, Michael D. and Wormley, Samuel J. and Hughes, Michael S. and Thompson, Donald O.},
abstractNote = {An apparatus and method for nonuniform poling of piezoelectric transducers includes machining one or more indentation into an end of a piezoelectric rod and cutting the rod to present a thickened disk shape. Highly electrically conductive material is deposited on at least the indentations in the one end and on at least portions of the opposite face of the member. One or more electrodes are configured to matingly fit within the indentations on the one face of the disk, with a like number of electrodes being positionable on the opposite face of the material. Electrical power is then applied to the electrodes in desired amounts, polarity, and duration. The indentations vary the electrical field produced within the piezoelectric material to produce nonuniform poling in the material. The thick disk is then cut to remove the indentations and to present a thin, flat two sided disk for installation in a conventional piezoelectric transducer probe. The indentations are selected to produce poling in accordance with desired transducer response profiles such as Gaussian or Bessel functions.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1990},
month = {10}
}

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