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Effect of sintering temperatures on the piezoelectric and dielectric properties of 0.98(Na0.5K0.5)NbO3-0.02(Ba0.5Ca0.5)TiO3 ceramics

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Abstract

Lead-free 0.98(Na0.5K0.5)NbO3-0.02(Ba0.5Ca0.5)TiO3 (0.98NKN-0.02BCT) ceramics were produced by using a conventional mixed oxide method with sintering temperature from 1080°C to 1120°C and their piezoelectric properties were investigated. The results indicate that the sintering temperature influences the electrical and the piezoelectric properties of 0.98NKN-0.02BCT ceramics. For the 0.98NKN-0.02BCT ceramics sintered from 1080°C to 1120°C, the piezoelectric constant d 33, electromechanical coupling factor k p , remnant polarization values P r and curie temperature T c increased with increase sintering temperature. However, for 0.98NKN-0.02BCT sintered above 1100°C, their values decreased. Piezoelectric properties of d 33 = 210 ρC/N and k p =46%, ferroelectric properties of P r = 16.2 µC/cm2 and dielectric constant ɛ r = 5159 were obtained for specimen sintered at 1100°C for 4 h. Therefore, the 0.98NKN-0.02BCT ceramics are excellent candidate materials for lead-free piezoelectric ceramics.

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Authors and Affiliations

  1. Dept. of Electronic Materials Engineering, Kwangwoon University, Kwangwoon, Korea

    Seung-Hyun Kim, Seung-Hwan Lee, Hyun-Ju Kim, Hong-Ki Kim, Won-Seock Woo & Young-Hie Lee

  2. Dept. of Ceramic Engineering, Eng. Res. Insti., Gyeongsang National University, Jinju-Si, Korea

    Sung-Gap Lee

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  1. Seung-Hyun Kim
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  2. Seung-Hwan Lee
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  3. Hyun-Ju Kim
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  4. Hong-Ki Kim
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  5. Won-Seock Woo
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  6. Sung-Gap Lee
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  7. Young-Hie Lee
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Correspondence to Young-Hie Lee.

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Kim, SH., Lee, SH., Kim, HJ. et al. Effect of sintering temperatures on the piezoelectric and dielectric properties of 0.98(Na0.5K0.5)NbO3-0.02(Ba0.5Ca0.5)TiO3 ceramics. Electron. Mater. Lett. 9, 237–240 (2013). https://doi.org/10.1007/s13391-012-2160-5

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  • DOI: https://doi.org/10.1007/s13391-012-2160-5

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