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Large blocking force in Bi1/2Na1/2TiO3-based lead-free piezoceramics

Dittmer, Robert and Aulbach, Emil and Jo, Wook and Webber, Kyle G. and Rödel, Jürgen (2012):
Large blocking force in Bi1/2Na1/2TiO3-based lead-free piezoceramics.
In: Scripta Materialia, pp. 100-103, 67, (1), ISSN 13596462,
[Online-Edition: http://dx.doi.org/10.1016/j.scriptamat.2012.03.031],
[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 and Aulbach, Emil and Jo, Wook and Webber, Kyle G. and 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: 67
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
Official URL: 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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