| Original Articles |
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Effects of Li Substitution and Sintering Temperature on Properties of Bi0.5(Na,K)0.5TiO3 Lead-Free Piezoelectric Ceramics |
| MING Bao-Quan1, WANG Jin-Feng1, ZANG Guo-Zhong2 |
| 1School of Physics, Shandong University, Jinan 2501002School of Material Science and Engineering, Liaocheng University, Liaocheng 252059 |
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| Cite this article: |
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MING Bao-Quan, WANG Jin-Feng, ZANG Guo-Zhong 2008 Chin. Phys. Lett. 25 3776-3778 |
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Abstract Bi0.5(Na0.72K0.28-xLix)0.5TiO3 (BNKLT-100x) lead-free piezoelectric ceramics are synthesized by conventional solid state sintering techniques. The dielectric and piezoelectric properties of the BNKLT-100x ceramics as a function of Li content are systematically investigated. It is found that not only Li content but also the sintering temperature has a strong effect on the piezoelectric properties of BNKLT. The piezoelectric constant d33 of BNKLT varies from 120 to 252pC/N in the Li content range from 0.03 to 0.16. In the sintering temperature range from 1080 to 1130°C, the d33 value of BNKLT-6 changes from 200pC/N to 252pC/N. The BNKLT-6 sample sintered at 1100°C has the highest piezoelectric constant d33 of 252pC/N, with the electromechanical coupling factors kp of 0.32 and kt of 0.44.
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| Keywords:
77.84.-s
77.84.Dy
77.65.-j
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Received: 26 January 2008
Published: 26 September 2008
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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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77.65.-j
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(Piezoelectricity and electromechanical effects)
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