Abstract
The dense bulk ZnO–Bi2O3–Co2O3 varistor ceramics were obtained via flash sintering. The effect of electric field on densification, microstructure, and electrical properties of ZnO–Bi2O3-based varistor ceramics, which were under different electric fields by a constant heating flash sintering process was investigated. The results showed that when the electric field was increased from 200 to 350 V/cm, the onset temperature of flash sintering decreased significantly, and the peak power consumption increased. The flash-sintered specimen under the electric field of 200 V/cm at a furnace temperature of 762 °C obtained the highest nonlinear coefficient of 41.1 and the lowest leakage current of 1.57 μA.
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The data that support the findings of this study are available from the corresponding author upon reasonable request.
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Acknowledgements
The research of flash sintering has been financially supported by the National Natural Science Foundation of China (Grant No. 52072004, 51802003) and Development Program of Anhui Province (No. 2022i01020008), and the State Key Laboratory of Advanced Materials and Electronic Components (No. FHR-JS-202011006).
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MS: Conceptualization, methodology, investigation, preparation, experiment, writing. JL: Draft visualization, experiment, analyzing writing. JL: Supervision, data curation. JX: Supervision. MJ: Investigation. DX: Guiding. All authors read the paper and commented on the text.
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Shi, M., Liu, J., Li, J. et al. Effects of the electric field on microstructure and electrical properties of ZnO–Bi2O3–Co2O3 varistor by flash sintering. J Mater Sci: Mater Electron 33, 17900–17911 (2022). https://doi.org/10.1007/s10854-022-08653-4
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DOI: https://doi.org/10.1007/s10854-022-08653-4