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High temperature blocking force measurements of soft lead zirconate titanate

Webber, Kyle G. and Aulbach, Emil and Rödel, Jürgen (2010):
High temperature blocking force measurements of soft lead zirconate titanate.
In: Journal of Physics D: Applied Physics, pp. 365401-1, 43, (36), ISSN 0022-3727, [Online-Edition: http://dx.doi.org/10.1088/0022-3727/43/36/365401],
[Article]

Abstract

Piezoelectric actuators outperform other technological solutions in the area of high-speed, high-force and high-accuracy displacement, but are only able to generate strains of about 0.2%. The load capability is generally quantified in terms of a blocking force, which is the force sustained under electric field at zero displacement. Stress–strain curves in a temperature regime from room temperature up to 150 °C on electrically loaded soft lead zirconate titanate (PZT) are generated to determine the blocking stress. The ensuing nonlinear behaviour is discussed in terms of ferroelectric and ferroelastic switching and contrasted to idealized linear constitutive behaviour as often assumed by manufacturers. The blocking stress is shown to increase with temperature due to an additional stiffening effect as a function of electric field. The actual mechanical work done is found to be larger than in the idealized case where linear constitutive behaviour is assumed.

Item Type: Article
Erschienen: 2010
Creators: Webber, Kyle G. and Aulbach, Emil and Rödel, Jürgen
Title: High temperature blocking force measurements of soft lead zirconate titanate
Language: English
Abstract:

Piezoelectric actuators outperform other technological solutions in the area of high-speed, high-force and high-accuracy displacement, but are only able to generate strains of about 0.2%. The load capability is generally quantified in terms of a blocking force, which is the force sustained under electric field at zero displacement. Stress–strain curves in a temperature regime from room temperature up to 150 °C on electrically loaded soft lead zirconate titanate (PZT) are generated to determine the blocking stress. The ensuing nonlinear behaviour is discussed in terms of ferroelectric and ferroelastic switching and contrasted to idealized linear constitutive behaviour as often assumed by manufacturers. The blocking stress is shown to increase with temperature due to an additional stiffening effect as a function of electric field. The actual mechanical work done is found to be larger than in the idealized case where linear constitutive behaviour is assumed.

Journal or Publication Title: Journal of Physics D: Applied Physics
Volume: 43
Number: 36
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Elektromechanik von Oxiden
11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials
Date Deposited: 17 Jun 2011 12:45
Official URL: http://dx.doi.org/10.1088/0022-3727/43/36/365401
Identification Number: doi:10.1088/0022-3727/43/36/365401
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