Abstract
The present work looked at the effect of the heat treatment temperatures on the electrical conductivity of ZrO2-MgO-Y2O3 ceramics, and their conduction behaviors were verified by analyzing the thermal behavior and structural changes. The results indicated that the heat treatment temperatures had a deterioration effect on the electrical conductivity of ZrO2-MgO-Y2O3 (1300–1500 °C). However, the deterioration effect was gradually restrained, and the conductivity exhibited an increasing trend when the temperatures further increased to 1600 °C. The possible cause was that the samples were equivalent to be further sintered at this temperature. Meanwhile, the mean diffusion distance of Mg ions in the ZrO2 lattice during cyclic heat treatment was evaluated, strongly correlated with the phase transformation and change of electrical conductivity of the sintered ZrO2-MgO-Y2O3 electrolyte ceramics. The research findings can be used to predict the changes of electrochemical properties of ZrO2(MgO) electrolyte ceramics during high-temperature applications.
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Funding
This work was financially supported by the National Natural Science Foundation of China (No. 52074070, No. 51974074 and No. 51874083), the State Key Program of National Natural Science Foundation of China (No. 51932008), and the Fundamental Research Funds for the Central Universities (N2124002-18).
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Wen, T., Yuan, L., Tian, C. et al. Electrical conductivity behavior of ZrO2-MgO-Y2O3 ceramic: effect of heat treatment temperature. J Aust Ceram Soc 58, 421–427 (2022). https://doi.org/10.1007/s41779-021-00686-y
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DOI: https://doi.org/10.1007/s41779-021-00686-y