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

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

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.

Item Type: Article
Erschienen: 2015
Creators: Wang, Ruiping and Wang, Ke and Yao, Fangzhou and Li, Jing-Feng and Schader, Florian H. and Webber, Kyle G. and Jo, Wook and Rödel, Jürgen
Title: Temperature Stability of Lead-Free Niobate Piezoceramics with Engineered Morphotropic Phase Boundary
Language: English
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.

Journal or Publication Title: Journal of the American Ceramic Society
Volume: 98
Number: 7
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Elektromechanik von Oxiden
11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 27 Jul 2015 08:22
Official URL: http://dx.doi.org/10.1111/jace.13604
Identification Number: doi:10.1111/jace.13604
Funders: 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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