| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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KNN Based Lead-Free Piezoceramics with Improved Thermal Stability |
| DU Juan1, WANG Jin-Feng1, ZHENG Li-Mei1, WANG Chun-Ming1, QI Peng2, ZANG Guo-Zhong3 |
| 1School of Physics, State Key laboratory of Crystal Materials, Shandong University, Jinan 2501002College of Physics Science and Technology, China University of Petroleum, Dongying 2570613College of Materials Science and Engineering, Liaocheng University, Liaocheng 252059 |
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| Cite this article: |
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DU Juan, WANG Jin-Feng, ZHENG Li-Mei et al 2009 Chin. Phys. Lett. 26 027701 |
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Abstract Lead-free piezoelectric ceramics (1-x)(Na0.53K0.404Li0.066)Nb0.92Sb0.08O3+xSrTiO3 are fabricated by conventional solid-state sintering method, and their dielectric and piezoelectric characteristics are investigated. With the addition of SrTiO3, the growth of the grain size is restrained, meanwhile the phase transition temperature of orthorhombic-tetragonal is shifted below room temperature. It is found that the ceramics with x=0.010 exhibit excellent piezoelectric properties (d33=220pC/N, kp=41%, kt=39%) and improved thermal stability around room temperature. The results indicate that these materials are promising lead-free piezoceramics for practical operations.
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| Keywords:
77.84.-s
77.84.Dy
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Received: 10 November 2008
Published: 20 January 2009
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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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