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Journal of Ceramic Science and Technology

The Journal of Ceramic Science and Technology publishes original scientific articles on all topics of ceramic science and technology from all ceramic branches. The focus is on the scientific exploration of  the relationships between processing, microstructure and properties of sintered ceramic materials as well as on new processing routes for innovative ceramic materials. The papers may have either theoretical or experimental background. A high quality of publications will be guaranteed by a thorough double blind peer review process.

The Journal is published by Göller Verlag GmbH on behalf of the Deutsche Keramische Gesellschaft (DKG). Edited by Yu-Ping Zeng, Shanghai Institute of Ceramics, Chinese Academy of Sciences, China.

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Experimental Determination of the Maximum Allowable Stresses for High-Power Piezoelectric Generators

H. Abramovich1, E. Tsikchotsky1, G. Klein2

1 Faculty of Aerospace Engineering, Technion, I.I.T., 32000 Haifa, Israel
2 Innowattech Ltd, 32000 Haifa, Israel

received March 13, 2013, received in revised form June 06, 2013, accepted June 18, 2013

Vol. 4, No. 3, Pages 131-136   DOI: 10.4416/JCST2013-00006

Abstract

High mechanical loads and/or electric fields or a combination of both tractions may lead to significant changes in the properties and parameters of PZT ceramics owing to the ferro-elastic processes in ceramics, domain wall motion, switching domains and the restructuring of the domain structures. This study uses well-designed tests to investigate the various parameters of high-power multi-element piezoelectric generators made from PZT ceramic under long-term cyclic external mechanical loading and presents maximum allowable working mechanical stresses. It has been shown that a stress of 30 MPa can be considered as a safe-side stress level, while 50 MPa can be regarded as the highest applicable stress; above or near 50 MPa, the PZT properties are substantially reduced, yielding a less effective high-power generator.

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Keywords

PZT, power generator, stress, cyclic loads, electrical resistance

References

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