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Lead-free piezoelectric ceramics of (Bi1/2Na1/2)TiO3–(Bi1/2K1/2)TiO3–(Bi1/2Ag1/2)TiO3 system

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Abstract

The ternary lead-free piezoelectric ceramics system of 0.90[x(Bi1/2Na1/2)TiO3–(1 − x)(Bi1/2K1/2)TiO3]–0.10(Bi1/2Ag1/2)TiO3 (x = 0.77, 0.79, 0.81, 0.83, 0.85) were successfully synthesized by conventional ceramic sintering technique. The samples were studied by X-ray diffraction, dielectric, ferroelectric and piezoelectric measurements. The MPB composition of the system appears to be near BNKA-79 according to the results of the X-ray diffraction and ferroelectric properties. The sample with x = 0.79 showed the highest piezoelectric constant d 33 = 160 pC/N. The maximum electromechanical coupling factors, k p and k t, are 0.30 for BNKA-79 and 0.42 for BNKA-85, respectively.

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Acknowledgements

This work was supported by the Ministry of Sciences and Technology of China through 973-project (2002CB613307), National Natural Science Foundation China (NSFC No. 50572113), and the Innovation Project of Shanghai Institute of Ceramics (SCX200409).

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Authors and Affiliations

  1. The State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, People’s Republic of China

    Yiqing Lu, Yongxiang Li, Dong Wang, Tianbao Wang & Qingrui Yin

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  1. Yiqing Lu
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  2. Yongxiang Li
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  3. Dong Wang
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  4. Tianbao Wang
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  5. Qingrui Yin
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Correspondence to Yongxiang Li.

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Lu, Y., Li, Y., Wang, D. et al. Lead-free piezoelectric ceramics of (Bi1/2Na1/2)TiO3–(Bi1/2K1/2)TiO3–(Bi1/2Ag1/2)TiO3 system. J Electroceram 21, 309–313 (2008). https://doi.org/10.1007/s10832-007-9145-z

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