| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Ca0.5Sr0.5TiO3-Modified KNN-Based Lead-Free Piezoceramics with a Wide Temperature Usage Span |
| DU Juan1**, WANG Jin-Feng2, ZANG Guo-Zhong1, YI Xiu-Jie1
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1College of Materials Science and Engineering, Liaocheng University, Liaocheng 252059
2School of Physics, Shandong University, Ji'nan 250100
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| Cite this article: |
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DU Juan, WANG Jin-Feng, ZANG Guo-Zhong et al 2011 Chin. Phys. Lett. 28 067701 |
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Abstract The strong temperature dependence of dielectric and piezoelectric properties is a big 'bottleneck' for practical applications of KNN-based piezoceramics. In order to resolve this problem, Ca0.5Sr0.5TiO3 (CST) is doped into (Na0.53K0.407Li0.063)Nb0.937Sb0.063O3 (NKLNS) ceramics. The thermal stability of s11E and k31 in the temperature range from −50°C to 200°C for ceramics with 1.0 and 1.5 mol% CST is raised in comparison with ceramics without CST. Ceramics with 1.5 mol% CST exhibit high piezoelectric properties (d33=202 pC/N, kp=44%) and low dielectric loss (2%) at room temperature. The excellent piezoelectric properties, which are comparable to conventional PZT ceramics, indicate that these ceramics are promising candidates for lead-free piezoelectric applications.
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| Keywords:
77.84.-s
77.84.Dy
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Received: 13 October 2010
Published: 29 May 2011
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| PACS: |
77.84.-s
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(Dielectric, piezoelectric, ferroelectric, and antiferroelectric materials)
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77.84.Dy
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