skip to main content
DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Means and method for nonuniform poling of piezoelectric transducers

Abstract

An apparatus and method are disclosed 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. 14 figs.

Inventors:
; ; ; ; ;
Issue Date:
OSTI Identifier:
7266230
Patent Number(s):
4961252 A
Application Number:
PPN: US 7-447831
Assignee:
Iowa State Univ. Research Foundation, Inc., Ames, IA (United States) PTO; EDB-94-118364
DOE Contract Number:  
W-7405-ENG-82
Resource Type:
Patent
Resource Relation:
Patent File Date: 8 Dec 1989
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION; TRANSDUCERS; DESIGN; FABRICATION; ELECTRIC FIELDS; PIEZOELECTRICITY; POLARIZATION; PROBES; ELECTRICITY; 440800* - Miscellaneous Instrumentation- (1990-)

Citation Formats

Hsu, D.K., Margetan, F.J., Hasselbusch, M.D., Wormley, S.J., Hughes, M.S., and Thompson, D.O. Means and method for nonuniform poling of piezoelectric transducers. United States: N. p., 1990. Web.
Hsu, D.K., Margetan, F.J., Hasselbusch, M.D., Wormley, S.J., Hughes, M.S., & Thompson, D.O. Means and method for nonuniform poling of piezoelectric transducers. United States.
Hsu, D.K., Margetan, F.J., Hasselbusch, M.D., Wormley, S.J., Hughes, M.S., and Thompson, D.O. Tue . "Means and method for nonuniform poling of piezoelectric transducers". United States.
@article{osti_7266230,
title = {Means and method for nonuniform poling of piezoelectric transducers},
author = {Hsu, D.K. and Margetan, F.J. and Hasselbusch, M.D. and Wormley, S.J. and Hughes, M.S. and Thompson, D.O.},
abstractNote = {An apparatus and method are disclosed 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. 14 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1990},
month = {10}
}