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Temperature Stability of Lead-Free Niobate Piezoceramics with Engineered Morphotropic Phase Boundary

Wang, Ruiping ; Wang, Ke ; Yao, Fangzhou ; Li, Jing-Feng ; Schader, Florian H. ; Webber, Kyle G. ; Jo, Wook ; Rödel, Jürgen :
Temperature Stability of Lead-Free Niobate Piezoceramics with Engineered Morphotropic Phase Boundary.
[Online-Edition: http://dx.doi.org/10.1111/jace.13604]
In: Journal of the American Ceramic Society, 98 (7) pp. 2177-2182. ISSN 00027820
[Artikel], (2015)

Offizielle URL: http://dx.doi.org/10.1111/jace.13604

Kurzbeschreibung (Abstract)

The temperature dependence of piezoelectric properties (direct piezoelectric coefficient d33, converse piezoelectric coefficient d33(E = 0), strain S and electromechanical coupling coefficient kp) for two niobate-based lead-free piezoceramics have been contrasted. 0.92(Na0.5K0.5)NbO3–0.02(Bi1/2Li1/2)TiO3–0.06BaZrO3 (6BZ/2BLT/92NKN) has a morphotropic phase boundary (MPB) between rhombohedral and tetragonal at room temperature and 0.92(Na0.5K0.5)NbO3–0.03(Bi1/2Li1/2)TiO3–0.05BaZrO3 (5BZ/3BLT/92NKN) features an MPB engineered to be located below room temperature. At 30°C, d33, d33(E = 0), S (at 2 kV/mm), and kp are 252 pC/N, 230 pm/V, 0.069%, 0.51 for 5BZ/3BLT/92NKN; and 348 pC/N, 380 pm/V, 0.106%, 0.57 for 6BZ/2BLT/92NKN, respectively. With increasing temperature, the piezoelectric properties decrease. At 200°C, d33, d33(E = 0), S (at 2 kV/mm), and kp are 170 pC/N, 160 pm/V, 0.059%, 0.36 for 5BZ/3BLT/92NKN; and 181 pC/N, 190 pm/V, 0.061%, 0.39 for 6BZ/2BLT/92NKN. It is found that the electromechanical coupling coefficient has a better temperature stability than the piezoelectric coefficient in the studied system due to a large temperature-dependent compliance change. The results demonstrate that engineering an MPB is highly effective in tailoring temperature stability of piezoceramics.

Typ des Eintrags: Artikel
Erschienen: 2015
Autor(en): Wang, Ruiping ; Wang, Ke ; Yao, Fangzhou ; Li, Jing-Feng ; Schader, Florian H. ; Webber, Kyle G. ; Jo, Wook ; Rödel, Jürgen
Titel: Temperature Stability of Lead-Free Niobate Piezoceramics with Engineered Morphotropic Phase Boundary
Sprache: Englisch
Kurzbeschreibung (Abstract):

The temperature dependence of piezoelectric properties (direct piezoelectric coefficient d33, converse piezoelectric coefficient d33(E = 0), strain S and electromechanical coupling coefficient kp) for two niobate-based lead-free piezoceramics have been contrasted. 0.92(Na0.5K0.5)NbO3–0.02(Bi1/2Li1/2)TiO3–0.06BaZrO3 (6BZ/2BLT/92NKN) has a morphotropic phase boundary (MPB) between rhombohedral and tetragonal at room temperature and 0.92(Na0.5K0.5)NbO3–0.03(Bi1/2Li1/2)TiO3–0.05BaZrO3 (5BZ/3BLT/92NKN) features an MPB engineered to be located below room temperature. At 30°C, d33, d33(E = 0), S (at 2 kV/mm), and kp are 252 pC/N, 230 pm/V, 0.069%, 0.51 for 5BZ/3BLT/92NKN; and 348 pC/N, 380 pm/V, 0.106%, 0.57 for 6BZ/2BLT/92NKN, respectively. With increasing temperature, the piezoelectric properties decrease. At 200°C, d33, d33(E = 0), S (at 2 kV/mm), and kp are 170 pC/N, 160 pm/V, 0.059%, 0.36 for 5BZ/3BLT/92NKN; and 181 pC/N, 190 pm/V, 0.061%, 0.39 for 6BZ/2BLT/92NKN. It is found that the electromechanical coupling coefficient has a better temperature stability than the piezoelectric coefficient in the studied system due to a large temperature-dependent compliance change. The results demonstrate that engineering an MPB is highly effective in tailoring temperature stability of piezoceramics.

Titel der Zeitschrift, Zeitung oder Schriftenreihe: Journal of the American Ceramic Society
Band: 98
(Heft-)Nummer: 7
Fachbereich(e)/-gebiet(e): Fachbereich Material- und Geowissenschaften > Materialwissenschaften > Elektromechanik von Oxiden
Fachbereich Material- und Geowissenschaften > Materialwissenschaften > Nichtmetallisch-Anorganische Werkstoffe
Fachbereich Material- und Geowissenschaften > Materialwissenschaften
Fachbereich Material- und Geowissenschaften
Hinterlegungsdatum: 27 Jul 2015 08:22
Offizielle URL: http://dx.doi.org/10.1111/jace.13604
ID-Nummer: 10.1111/jace.13604
Sponsoren: F.H.S. and K.G.W. gratefully acknowledge financial support from the Deutsche Forschungsgemeinschaft under WE 4972/1-1 and WE 4972/2-1., JR is thankful for travel support for RW through SFB 595., K. W. and J.-F. Li acknowledge the support from National Nature Science Foundation of China (grants no. 51332002 and 51302144)., WJ acknowledges the financial support from the 2014 Research Fund (1.140040) of UNIST (Ulsan National Institute of Science and Technology).
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