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Effect of ZnO Nanoparticles on the Sintering Behavior and Physical Properties of Bi0.5(Na0.8K0.2)0.5TiO3 Lead-Free Ceramics

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Abstract

Sintered Bi0.5(Na0.8K0.2)0.5TiO3 + x wt.% ZnO nanoparticle (BNKT–xZnOn) ceramics have been fabricated by conventional annealing with the aid of ultrasound waves for preliminary milling. Because of the presence of the liquid Bi2O3–ZnO phase at the eutectic point of 738°C, the sintering temperature decreased from 1150°C to 1000°C, and the morphology phase boundary of BNKT–xZnOn ceramics can be clarified by two separated peaks at (002)T and (200)T of 2θ in the x-ray diffraction (XRD) patterns. The improvement of ferroelectric properties has been obtained for BNZT–0.2 wt.% ZnOn ceramics by the increase of remanent polarization up to 20.4 μC/cm2 and a decrease of electric coercive field down to 14.2 kV/cm. The piezoelectric parameters of the ceramic included a piezoelectric charge constant of d 31 = 78 pC/N; electromechanical coupling factors k p = 0.31 and k t = 0.34, larger than the values of 42 pC/N, 0.12 and 0.13, respectively, were obtained for the BNKT ceramics.

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Acknowledgement

This research was funded by the Vietnam National Foundation for Science and Technology Development (NAFOSTED) under Grant Number 103.02-2015.66.

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Authors and Affiliations

  1. Faculty of Chemical and Environmental Engineering, Hue Industrial College, Hue City, Vietnam

    Le Dai Vuong

  2. Department of Physics, College of Sciences, Hue University, Hue City, Vietnam

    Nguyen Truong-Tho

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  1. Le Dai Vuong
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  2. Nguyen Truong-Tho
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Correspondence to Le Dai Vuong.

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Vuong, L.D., Truong-Tho, N. Effect of ZnO Nanoparticles on the Sintering Behavior and Physical Properties of Bi0.5(Na0.8K0.2)0.5TiO3 Lead-Free Ceramics. J. Electron. Mater. 46, 6395–6402 (2017). https://doi.org/10.1007/s11664-017-5665-8

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  • DOI: https://doi.org/10.1007/s11664-017-5665-8

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