Kounga, Alain Brice ; Zhang, Shan-Tao ; Jo, Wook ; Granzow, Torsten ; Rödel, Jürgen (2008):
Morphotropic phase boundary in (1−x)Bi[sub 0.5]Na[sub 0.5]TiO[sub 3]–xK[sub 0.5]Na[sub 0.5]NbO[sub 3] lead-free piezoceramics.
In: Applied Physics Letters, 92 (22), pp. 222902-1. ISSN 00036951,
[Article]
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Abstract
The electromechanical behavior of (1−x)Bi0.5Na0.5TiO3–xK0.5Na0.5NbO3 (BNT-KNN) lead free piezoelectric ceramics is investigated for 0 <= x <= 0.12 to gain insight into the antiferroelectric-ferroelectric (AFE-FE) phase transition on the basis of the giant strain recently observed in BNT-based systems. At x ≈ 0.07, a morphotropic phase boundary (MPB) between a rhombohedral FE phase and a tetragonal AFE phase is found. While the piezoelectric coefficient is largest at this MPB, the total strain further increases with increasing KNN content, indicating the field-induced AFE-FE transition as the main reason for the large strain.
Item Type: |
Article
|
Erschienen: |
2008 |
Creators: |
Kounga, Alain Brice ; Zhang, Shan-Tao ; Jo, Wook ; Granzow, Torsten ; Rödel, Jürgen |
Title: |
Morphotropic phase boundary in (1−x)Bi[sub 0.5]Na[sub 0.5]TiO[sub 3]–xK[sub 0.5]Na[sub 0.5]NbO[sub 3] lead-free piezoceramics |
Language: |
English |
Abstract: |
The electromechanical behavior of (1−x)Bi0.5Na0.5TiO3–xK0.5Na0.5NbO3 (BNT-KNN) lead free piezoelectric ceramics is investigated for 0 <= x <= 0.12 to gain insight into the antiferroelectric-ferroelectric (AFE-FE) phase transition on the basis of the giant strain recently observed in BNT-based systems. At x ≈ 0.07, a morphotropic phase boundary (MPB) between a rhombohedral FE phase and a tetragonal AFE phase is found. While the piezoelectric coefficient is largest at this MPB, the total strain further increases with increasing KNN content, indicating the field-induced AFE-FE transition as the main reason for the large strain. |
Journal or Publication Title: |
Applied Physics Letters |
Journal volume: |
92 |
Number: |
22 |
Uncontrolled Keywords: |
bismuth compounds, ferroelectric transitions, piezoceramics, piezoelectricity, potassium compounds, sodium compounds |
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 > Nonmetallic-Inorganic Materials 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 > CRC 595: Electrical fatigue > D - Component properties > Subproject D1: Mesoscopic and macroscopic fatigue in doped ferroelectric ceramics 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 > D - Component properties DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue Zentrale Einrichtungen DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres DFG-Collaborative Research Centres (incl. Transregio) |
Date Deposited: |
15 Jun 2011 08:17 |
Official URL: |
http://dx.doi.org/10.1063/1.2938064 |
Additional Information: |
SFB 595 Cooperation A1, D1 |
Identification Number: |
doi:10.1063/1.2938064 |
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