Brandt, David R. J. ; Acosta, Matias ; Koruza, Jurij ; Webber, Kyle G. (2014):
Mechanical constitutive behavior and exceptional blocking force of lead-free BZT-xBCT piezoceramics.
In: Journal of Applied Physics, 115 (20), pp. 204107(1-7). ISSN 0021-8979,
[Article]
Abstract
The free strain during unipolar electrical activation and the blocking stress are important figures of merit for actuator applications. The lead-free (1 − x)Ba(Zr0.2Ti0.8)O3−x(Ba0.7Ca0.3)TiO3 (BZT-xBCT) system has been shown to display exceptional unipolar strain at room temperature, making it very attractive as an electroactive material for large displacement, low frequency actuation systems. In this work, the temperature- and composition-dependent blocking stress is measured with the proportional loading method. It was found that BZT-xBCT outperformed Pb(Zr1− x Ti x )O3 and Bi1/2 Na 1/2TiO3–based ceramics for electric fields up to 2 kV/mm.
| Item Type: | Article |
|---|---|
| Erschienen: | 2014 |
| Creators: | Brandt, David R. J. ; Acosta, Matias ; Koruza, Jurij ; Webber, Kyle G. |
| Title: | Mechanical constitutive behavior and exceptional blocking force of lead-free BZT-xBCT piezoceramics |
| Language: | English |
| Abstract: | The free strain during unipolar electrical activation and the blocking stress are important figures of merit for actuator applications. The lead-free (1 − x)Ba(Zr0.2Ti0.8)O3−x(Ba0.7Ca0.3)TiO3 (BZT-xBCT) system has been shown to display exceptional unipolar strain at room temperature, making it very attractive as an electroactive material for large displacement, low frequency actuation systems. In this work, the temperature- and composition-dependent blocking stress is measured with the proportional loading method. It was found that BZT-xBCT outperformed Pb(Zr1− x Ti x )O3 and Bi1/2 Na 1/2TiO3–based ceramics for electric fields up to 2 kV/mm. |
| Journal or Publication Title: | Journal of Applied Physics |
| Volume of the journal: | 115 |
| Issue Number: | 20 |
| Uncontrolled Keywords: | Piezoelectric fields; Piezoelectric transducers; Stress strain relations; Ferroelectric materials; Piezoelectric devices |
| 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 DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres DFG-Collaborative Research Centres (incl. Transregio) |
| Date Deposited: | 08 Jul 2014 08:32 |
| URL / URN: | http://dx.doi.org/10.1063/1.4879395 |
| Additional Information: | SFB 595 D6 |
| Identification Number: | doi:10.1063/1.4879395 |
| PPN: | |
| Funders: | This work was supported by the Deutsche Forschungsgemeinschaft through the Sonderforschungsbereich 595/D6 “Electrical Fatigue in Functional Materials” and the AdRIA Hesse state center for Adaptronics. |
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