Koruza, Jurij ; Franzbach, Daniel ; Schader, Florian ; Rojas, Virginia ; Webber, Kyle G. (2015)
Enhancing the operational range of piezoelectric actuators by uniaxial compressive preloading.
In: Journal of Physics D: Applied Physics, 48 (21)
doi: 10.1088/0022-3727/48/21/215302
Article, Bibliographie
Abstract
The influence of the uniaxial preload on the off-resonance actuation performance of piezoelectric ceramics was investigated for compressive preload values up to −80 MPa. The study was performed on soft-type lead zirconate titanate (PZT), being the most widely used piezoelectric material. The samples were analysed using the proportional loading method, which enables the simultaneous application of electrical and mechanical loads, thereby mimicking the real operation conditions over the full stress–strain range. An increase of the blocking stress and the longitudinal piezoelectric stress coefficient was observed for all the applied preload values. The optimum properties, a blocking stress of −56 MPa and a free strain of 0.23%, were obtained at a preload value of −40 MPa and electric field of 2 kV mm − 1. This represents an increase of 16% and 20%, respectively, as compared to the values obtained at the smallest preload. In addition, the maximum work output was increased by about 28%. Finally, the results obtained at the lowest preload of −4 MPa using the proportional loading method were compared to the operational ranges determined by other methods. The comparison revealed large discrepancies between the methods, originating from the different order of the application of electrical and mechanical fields and the inherent nonlinearity of ferroelectric materials. This discrepancy results in decreased actuator performance due to impedance mismatching, demonstrating the need for accurate determination of the actuator's operational range.
| Item Type: | Article |
|---|---|
| Erschienen: | 2015 |
| Creators: | Koruza, Jurij ; Franzbach, Daniel ; Schader, Florian ; Rojas, Virginia ; Webber, Kyle G. |
| Type of entry: | Bibliographie |
| Title: | Enhancing the operational range of piezoelectric actuators by uniaxial compressive preloading |
| Language: | English |
| Date: | 6 June 2015 |
| Journal or Publication Title: | Journal of Physics D: Applied Physics |
| Volume of the journal: | 48 |
| Issue Number: | 21 |
| DOI: | 10.1088/0022-3727/48/21/215302 |
| Abstract: | The influence of the uniaxial preload on the off-resonance actuation performance of piezoelectric ceramics was investigated for compressive preload values up to −80 MPa. The study was performed on soft-type lead zirconate titanate (PZT), being the most widely used piezoelectric material. The samples were analysed using the proportional loading method, which enables the simultaneous application of electrical and mechanical loads, thereby mimicking the real operation conditions over the full stress–strain range. An increase of the blocking stress and the longitudinal piezoelectric stress coefficient was observed for all the applied preload values. The optimum properties, a blocking stress of −56 MPa and a free strain of 0.23%, were obtained at a preload value of −40 MPa and electric field of 2 kV mm − 1. This represents an increase of 16% and 20%, respectively, as compared to the values obtained at the smallest preload. In addition, the maximum work output was increased by about 28%. Finally, the results obtained at the lowest preload of −4 MPa using the proportional loading method were compared to the operational ranges determined by other methods. The comparison revealed large discrepancies between the methods, originating from the different order of the application of electrical and mechanical fields and the inherent nonlinearity of ferroelectric materials. This discrepancy results in decreased actuator performance due to impedance mismatching, demonstrating the need for accurate determination of the actuator's operational range. |
| Additional Information: | SFB 595 D6 |
| Divisions: | 11 Department of Materials and Earth Sciences > Material Science > Elektromechanik von Oxiden 11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > D - Component properties > Subproject D6: The effect of electric field-induced phase transitions on the blocking force in lead-free ferroelectrics 11 Department of Materials and Earth Sciences > Material Science DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > D - Component properties DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue 11 Department of Materials and Earth Sciences Zentrale Einrichtungen Exzellenzinitiative DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres DFG-Collaborative Research Centres (incl. Transregio) Exzellenzinitiative > Graduate Schools > Graduate School of Computational Engineering (CE) Exzellenzinitiative > Graduate Schools |
| Date Deposited: | 22 Apr 2015 07:45 |
| Last Modified: | 22 Sep 2016 08:05 |
| PPN: | |
| Funders: | This work was financially supported by the Deutsche Forschungsgemeinschaft under SFB 595/D6 and benefited from the support of the DFG under WE 4972/1-1. |
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