Dittmer, Robert ; Aulbach, Emil ; Jo, Wook ; Webber, Kyle G. ; Rödel, Jürgen (2012):
Large blocking force in Bi1/2Na1/2TiO3-based lead-free piezoceramics.
In: Scripta Materialia, 67 (1), pp. 100-103. ISSN 13596462,
[Article]
Abstract
Blocking stress (σb) and free strain (Sf) are the most important parameters for piezoelectric actuators, both having a decisive impact on the electromechanical performance. Here, we report on the blocking stress of lead-free piezoceramics, using 0.94Bi1/2Na1/2TiO3–0.06BaTiO3 (6BT) and 0.98(0.94Bi1/2Na1/2TiO3–0.06BaTiO3)–0.02K0.5Na0.5NbO3 (2KNN) as prototypical compositions. While 6BT delivers high σb = 102 MPa at 125 °C, the addition of 2 mol.% K0.5Na0.5NbO3 results in a large σb = 124 MPa at room temperature. Therefore, both lead-free materials outperform lead zirconate titanate at their respective peak temperatures.
| Item Type: | Article |
|---|---|
| Erschienen: | 2012 |
| Creators: | Dittmer, Robert ; Aulbach, Emil ; Jo, Wook ; Webber, Kyle G. ; Rödel, Jürgen |
| Title: | Large blocking force in Bi1/2Na1/2TiO3-based lead-free piezoceramics |
| Language: | English |
| Abstract: | Blocking stress (σb) and free strain (Sf) are the most important parameters for piezoelectric actuators, both having a decisive impact on the electromechanical performance. Here, we report on the blocking stress of lead-free piezoceramics, using 0.94Bi1/2Na1/2TiO3–0.06BaTiO3 (6BT) and 0.98(0.94Bi1/2Na1/2TiO3–0.06BaTiO3)–0.02K0.5Na0.5NbO3 (2KNN) as prototypical compositions. While 6BT delivers high σb = 102 MPa at 125 °C, the addition of 2 mol.% K0.5Na0.5NbO3 results in a large σb = 124 MPa at room temperature. Therefore, both lead-free materials outperform lead zirconate titanate at their respective peak temperatures. |
| Journal or Publication Title: | Scripta Materialia |
| Volume of the journal: | 67 |
| Issue Number: | 1 |
| Uncontrolled Keywords: | Ceramics; Phase transformations; Compression test; Ferroelectricity; Elastic behaviour |
| Divisions: | 11 Department of Materials and Earth Sciences 11 Department of Materials and Earth Sciences > Material Science 11 Department of Materials and Earth Sciences > Material Science > Elektromechanik von Oxiden 11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials Zentrale Einrichtungen DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > A - Synthesis DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > A - Synthesis > Subproject A1: Manufacturing of ceramic, textured actuators with high strain DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres DFG-Collaborative Research Centres (incl. Transregio) |
| Date Deposited: | 21 May 2012 09:39 |
| URL / URN: | http://dx.doi.org/10.1016/j.scriptamat.2012.03.031 |
| Additional Information: | SFB 595 A1 |
| Identification Number: | doi:10.1016/j.scriptamat.2012.03.031 |
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