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Fatigue In Bulk Lead Zirconate Titanate Actuator Materials

Lupascu, Doru C. and Rödel, Jürgen (2005):
Fatigue In Bulk Lead Zirconate Titanate Actuator Materials.
In: Advanced Engineering Materials, pp. 882-898, 7, (10), ISSN 1438-1656, [Online-Edition: http://dx.doi.org/10.1002/adem.200500117],
[Article]

Abstract

Fatigue in ferroelectric ceramics is the gradual change of material properties with cyclic loading. It is caused by microscopic material modifications of mechanical or electrical origin. Due to the electromechanical coupling, both mechanisms can yield similar or even identical changes in properties. Macroscopically, a reduction of switchable polarization is anticipated and asymmetries in the macroscopic hysteresis curves arise due to charge carrier migration. This review elaborates on the multiple loading scenarios that lead to asymmetries in material response and loss in performance. The disparities between unipolar, bipolar, and mixed electromechanical loading are displayed. Possible microscopic origins are categorized. The strong similarities in the roles of microcracks, dielectric layers, and grain boundaries are worked out.

Item Type: Article
Erschienen: 2005
Creators: Lupascu, Doru C. and Rödel, Jürgen
Title: Fatigue In Bulk Lead Zirconate Titanate Actuator Materials
Language: English
Abstract:

Fatigue in ferroelectric ceramics is the gradual change of material properties with cyclic loading. It is caused by microscopic material modifications of mechanical or electrical origin. Due to the electromechanical coupling, both mechanisms can yield similar or even identical changes in properties. Macroscopically, a reduction of switchable polarization is anticipated and asymmetries in the macroscopic hysteresis curves arise due to charge carrier migration. This review elaborates on the multiple loading scenarios that lead to asymmetries in material response and loss in performance. The disparities between unipolar, bipolar, and mixed electromechanical loading are displayed. Possible microscopic origins are categorized. The strong similarities in the roles of microcracks, dielectric layers, and grain boundaries are worked out.

Journal or Publication Title: Advanced Engineering Materials
Volume: 7
Number: 10
Uncontrolled Keywords: Actuator materials; Fatigue; Titanates; Zirconates
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 18 May 2011 15:19
Official URL: http://dx.doi.org/10.1002/adem.200500117
Additional Information:

SFB 595 D1

Identification Number: doi:10.1002/adem.200500117
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