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An ideal amplitude window against electric fatigue in BaTiO3-based lead-free piezoelectric materials

Fan, Zhongming and Koruza, Jurij and Rödel, Jürgen and Tan, Xiaoli (2018):
An ideal amplitude window against electric fatigue in BaTiO3-based lead-free piezoelectric materials.
In: Acta Materialia, Elsevier, pp. 253-259, 151, ISSN 13596454,
DOI: 10.1016/j.actamat.2018.03.067,
[Article]

Abstract

Electric fatigue has been a vexing issue for Pb(Zr,Ti)O3 ceramics, the material-of-choice for piezoelectric technologies, where higher field amplitudes always lead to a more severe property degradation. Thus, piezoelectric devices must be driven under low electric fields to ensure performance reliability, which results in a low efficiency. In the past decade, the intensive worldwide research on lead-free compositions has identified a few ceramics with piezoelectric properties comparable to those of lead-containing ones. However, their resistance to electric fatigue has not been well studied. In this work, we report an abnormal amplitude dependence of electric fatigue in lead-free piezoelectrics: A BaTiO3-based ceramic suffers fatigue degradation when the field amplitude is low, but exhibits an amplitude window at higher fields with essentially no fatigue. Furthermore, electric-field in-situ transmission electron microscopy (TEM) experiments up to 105 cycles are conducted to clearly reveal that the degradation at low fields is due to the unique single-domain state. We, therefore, have identified an ideal amplitude window with performance at full potential and, at the same time, extremely high reliability for a lead-free piezoelectric ceramic that is promising to replace Pb(Zr,Ti)O3.

Item Type: Article
Erschienen: 2018
Creators: Fan, Zhongming and Koruza, Jurij and Rödel, Jürgen and Tan, Xiaoli
Title: An ideal amplitude window against electric fatigue in BaTiO3-based lead-free piezoelectric materials
Language: English
Abstract:

Electric fatigue has been a vexing issue for Pb(Zr,Ti)O3 ceramics, the material-of-choice for piezoelectric technologies, where higher field amplitudes always lead to a more severe property degradation. Thus, piezoelectric devices must be driven under low electric fields to ensure performance reliability, which results in a low efficiency. In the past decade, the intensive worldwide research on lead-free compositions has identified a few ceramics with piezoelectric properties comparable to those of lead-containing ones. However, their resistance to electric fatigue has not been well studied. In this work, we report an abnormal amplitude dependence of electric fatigue in lead-free piezoelectrics: A BaTiO3-based ceramic suffers fatigue degradation when the field amplitude is low, but exhibits an amplitude window at higher fields with essentially no fatigue. Furthermore, electric-field in-situ transmission electron microscopy (TEM) experiments up to 105 cycles are conducted to clearly reveal that the degradation at low fields is due to the unique single-domain state. We, therefore, have identified an ideal amplitude window with performance at full potential and, at the same time, extremely high reliability for a lead-free piezoelectric ceramic that is promising to replace Pb(Zr,Ti)O3.

Journal or Publication Title: Acta Materialia
Volume: 151
Publisher: Elsevier
Uncontrolled Keywords: Ferroelectric Fatigue In-situ transmission electron microscopy (TEM) Single-domain
Divisions: 11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials
11 Department of Materials and Earth Sciences
Date Deposited: 13 Apr 2018 06:26
DOI: 10.1016/j.actamat.2018.03.067
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