Han, Hyoung-Su ; Koruza, Jurij ; Patterson, Eric A. ; Schultheiß, Jan ; Erdem, Emre ; Jo, Wook ; Lee, Jae-Shin ; Rödel, Jürgen (2017)
Hardening behavior and highly enhanced mechanical quality factor in(K0.5Na0.5)NbO3–based ceramics.
In: Journal of the European Ceramic Society, 37 (5)
doi: 10.1016/j.jeurceramsoc.2017.01.013
Article, Bibliographie
Abstract
This paper relates the microstructure, crystallographic structure, ferroelectric, and piezoelectric prop-erties of (K0.5Na0.5)NbO3(KNN) ceramics modified with 0.38 mol% K5.4Cu1.3Ta10O29(KCT) and differentamounts of CuO. Results revealed that the addition of KCT and CuO were effective in enhancing thesinterability of KNN. The internal bias field (Eib) increased from 0.3 kV/mm to 0.58 kV/mm at 0.5 mol%CuO–added KNN+KCT ceramics. The increase of Eibcorresponds very well with the observed increase ofthe mechanical quality factor (Qm) from 112 to 2665 for 0.5 mol% CuO. Besides, addition of 0.5 mol% CuOto KNN+KCT resulted in a large increase of the EPR signal, which is related to the increased amount Cu2+and a corresponding increase of the concentration of defect dipoles. This result is in good agreement withthe increased Eiband the resulting hardening behavior.
| Item Type: | Article |
|---|---|
| Erschienen: | 2017 |
| Creators: | Han, Hyoung-Su ; Koruza, Jurij ; Patterson, Eric A. ; Schultheiß, Jan ; Erdem, Emre ; Jo, Wook ; Lee, Jae-Shin ; Rödel, Jürgen |
| Type of entry: | Bibliographie |
| Title: | Hardening behavior and highly enhanced mechanical quality factor in(K0.5Na0.5)NbO3–based ceramics |
| Language: | English |
| Date: | 20 February 2017 |
| Publisher: | Elsevier |
| Journal or Publication Title: | Journal of the European Ceramic Society |
| Volume of the journal: | 37 |
| Issue Number: | 5 |
| DOI: | 10.1016/j.jeurceramsoc.2017.01.013 |
| Abstract: | This paper relates the microstructure, crystallographic structure, ferroelectric, and piezoelectric prop-erties of (K0.5Na0.5)NbO3(KNN) ceramics modified with 0.38 mol% K5.4Cu1.3Ta10O29(KCT) and differentamounts of CuO. Results revealed that the addition of KCT and CuO were effective in enhancing thesinterability of KNN. The internal bias field (Eib) increased from 0.3 kV/mm to 0.58 kV/mm at 0.5 mol%CuO–added KNN+KCT ceramics. The increase of Eibcorresponds very well with the observed increase ofthe mechanical quality factor (Qm) from 112 to 2665 for 0.5 mol% CuO. Besides, addition of 0.5 mol% CuOto KNN+KCT resulted in a large increase of the EPR signal, which is related to the increased amount Cu2+and a corresponding increase of the concentration of defect dipoles. This result is in good agreement withthe increased Eiband the resulting hardening behavior. |
| Uncontrolled Keywords: | Lead-free Piezoelectric ceramics KNN Hardening effect Mechanical quality factor |
| 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: | 21 Feb 2017 06:48 |
| Last Modified: | 21 Feb 2017 06:48 |
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