Large strain actuation in barium titanate single crystals under stress and electric field

Shieh, J., Shu, Y. C., Yeh, J. H. and Yen, J. H. (2007). Large strain actuation in barium titanate single crystals under stress and electric field. In: Martin Veidt, Faris Albermani, Bill Daniel, John Griffiths, Doug Hargreaves, Ross McAree, Paul Meehan and Andy Tan, Proceedings of the 5th Australasian Congress on Applied Mechanics (ACAM 2007). 5th Australasian Congress on Applied Mechanics (ACAM 2007), Brisbane, Australia, (527-532). 10-12 December, 2007.

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C4.1.pdf Session C4.1: barium titanate: Shieh papers application/pdf 569.28KB 451
Author Shieh, J.
Shu, Y. C.
Yeh, J. H.
Yen, J. H.
Title of paper Large strain actuation in barium titanate single crystals under stress and electric field
Conference name 5th Australasian Congress on Applied Mechanics (ACAM 2007)
Conference location Brisbane, Australia
Conference dates 10-12 December, 2007
Proceedings title Proceedings of the 5th Australasian Congress on Applied Mechanics (ACAM 2007)
Place of Publication Brisbane
Publisher Engineers Australia
Publication Year 2007
Year available 2008
Sub-type Fully published paper
ISBN 0 8582 5862 5
Editor Martin Veidt
Faris Albermani
Bill Daniel
John Griffiths
Doug Hargreaves
Ross McAree
Paul Meehan
Andy Tan
Volume 1
Start page 527
End page 532
Total pages 6
Collection year 2007
Language eng
Abstract/Summary Large strain actuation in barium titanate (BaTiO3) single crystals subjected to combined uniaxial stress and electric field is examined. A maximum strain of about 0.45% is measured under a combined loading of 2.7 MPa compressive stress and ±1.25 MVm-1 cyclic electric field. Above 2.7 MPa, the crystal does not cycle fully between the in-plane and out-of-plane polarized states due to large compressive stress, and consequently, a considerable reduction in actuation strain is apparent. The hysteresis evolution of the crystal under combined electromechanical loading reveals incomplete switching characteristics and a considerable disproportion of slope gradients at zero electric field for the measured polarization and strain hysteresis curves. A likely cause for the disproportion of slope gradients is the cooperative operation of multiple 90° switching systems by which “polarization-free” strain changes are induced.
Subjects 290501 Mechanical Engineering
Keyword BaTiO3
domain switching
electromechanical loading
hysteresis
single crystals
Q-Index Code E1
Q-Index Status Provisional Code
Institutional Status Unknown

 
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Created: Wed, 12 Mar 2008, 15:39:45 EST by Laura McTaggart on behalf of School of Engineering