An optical method to assess electromechanical coupling in ferroelectric ceramics |
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Authors: | A B Kounga Njiwa D C Lupascu E Aulbach J Rödel |
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Institution: | (1) Institute of Materials Science, Darmstadt University of Technology, Petersenstrasse 23, 64287 Darmstadt, Germany |
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Abstract: | A new technique is described, which allows the assessment of elastic and inelastic regions around a macroscopic defect in
ferroelectric-ferroelastic ceramics. The accuracy and robustness of the method are demonstrated on a PZT plate with a centered
hole subjected to uni-axial compressive stresses. From the electrical potential distribution on the sample surface, the mechanical
response of the material is obtained at different load levels. |
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Keywords: | Piezoelectricity domain switching liquid crystals stress field stress concentrators |
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