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Influence of sintering temperature on piezoelectric properties of (K0.4425Na0.52Li0.0375)(Nb0.8925Sb0.07Ta0.0375)O3 lead-free piezoelectric ceramics

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Abstract

Microstructure characteristics, phase transition, and electrical properties of (K0.4425Na0.52Li0.0375) (Nb0.8925Sb0.07Ta0.0375)O3 (KNLNST) lead-free piezoelectric ceramics prepared by normal sintering were investigated with an emphasis on the influence of sintering temperature. The microstructure and piezoelectric, ferroelectric, and dielectric properties were investigated, with a special emphasis on the influence of sintering temperature from 1,100 to 1,140 °C. Orthorhombic phases mainly exist in the ceramics sintered at 1,100–1,130 °C, whereas the tetragonal phase becomes dominant when sintering temperature is above 1,130 °C. Because of the existence of MPB-like transitional behavior, the piezoelectric coefficient (d 33), electromechanical coupling coefficient (kp), and dielectric constant (ε) show peak values of 304pC/N, 0.48, and 1,909, respectively, which are obtained in the sample sintered at 1,120 °C, and its Curie temperature (T C) is about 271 °C.

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Acknowledgments

This work was supported by the National Nature Science Foundation of China (NSFC No. 50872053). Aeronautical Science Fund (No. 2009ZF52058), Program for Changjiang Scholars and Innovative Research Team in University (Irt0906)and Program for New Century Excellent Talents in University (NCET-10-0070).

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Authors and Affiliations

  1. Key Laboratory of Vehicle Structural Mechanics and Control of Ministry of Education, Nanjing University of Aeronautics and Astronautics, 210016, Nanjing, Jiangsu, People’s Republic of China

    Xuming Pang, Jinhao Qiu, Kongjun Zhu & Bin Shao

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  1. Xuming Pang
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  2. Jinhao Qiu
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  3. Kongjun Zhu
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  4. Bin Shao
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Correspondence to Jinhao Qiu.

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Pang, X., Qiu, J., Zhu, K. et al. Influence of sintering temperature on piezoelectric properties of (K0.4425Na0.52Li0.0375)(Nb0.8925Sb0.07Ta0.0375)O3 lead-free piezoelectric ceramics. J Mater Sci: Mater Electron 22, 1783–1787 (2011). https://doi.org/10.1007/s10854-011-0363-4

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  • DOI: https://doi.org/10.1007/s10854-011-0363-4

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