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The effect of tantalum substitution on the microstructure and dielectric and piezoelectric properties of Pb0.99(Zr0.95Ti0.05)0.98Nb0.02O3 ceramics

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Abstract

Lead zirconate titanate (PZT95/5) based piezoelectric ceramics with the compositions Pb0.99(Zr0.95Ti0.05)0.98Ta0.02O3 (PZTT) and Pb0.99−0.5x(Zr0.95Ti0.05)0.98−xNb0.02TaxO3 (PZTN), where x = 0.0, 0.005, 0.010, 0.015 and 0.020 were synthesized using conventional solid state sintering at 1250 °C for 2 h in air. The effect of tantalum substitution on the microstructure, dielectric and piezoelectric properties of the samples were studied. The results showed that the Ta-doped samples had finer microstructures. The PZTT samples had microstructures with finer grains (average grain size of 3.80 µm) in comparison with the PZTN samples (average grain size of 5.33 µm). The relative densities of the PZTN and PZTT samples were approximately 94.1 and 94.4%, respectively. Moreover, the relative dielectric constant (εr), piezoelectric coefficient (d31) and elastic compliance (S11E) of the samples reached the maximum values of 349, − 15.2 PC/N and 8.42 Pm2/N, respectively at 1.5 mol% tantalum substitution. Furthermore, the relative dielectric constant (εr), piezoelectric coefficient (d33) and voltage coefficient (g33) of the PZTN samples reached the optimal values of 306, 69 PC/N and 25.44 mV m/N, respectively, in comparison with the PZTT samples (329, 67 PC/N and 21.43 mV m/N, respectively). The results indicate that the tantalum doped PZT95/5 ceramics can be used for pulsed power devices.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Faculty of Engineering, Imam Khomeini International University, Qazvin, Iran

    Afshin Ansari, Mohammad Masoud Mohebi & Saeid Baghshahi

  2. Department of Ceramic Engineering, Material and Energy Research Centre, Tehran, Alborz, Iran

    Reza Tabarzadi

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  1. Afshin Ansari
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  2. Mohammad Masoud Mohebi
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Correspondence to Mohammad Masoud Mohebi.

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Ansari, A., Mohebi, M.M., Baghshahi, S. et al. The effect of tantalum substitution on the microstructure and dielectric and piezoelectric properties of Pb0.99(Zr0.95Ti0.05)0.98Nb0.02O3 ceramics. J Mater Sci: Mater Electron 29, 17948–17955 (2018). https://doi.org/10.1007/s10854-018-9910-6

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