On the electric conduction of ZrO2 in the steady stage of flash sintering
On the electric conduction of ZrO2 in the steady stage of flash sintering
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ZrO2在闪速烧结稳定阶段的导电行为研究
DOI：
10.1016/j.ceramint.2019.11.019
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发表时间：
2020
影响因子：
5.2
通讯作者：
An Linan
中科院分区：
文献类型：
--
作者：
Lu Shichen;Liu Jinling;Shao Gang;Liu Wen;Zhao Rui;Liu Dianguang;Wang Hailong;Zhang Rui;Lu Hongxia;An Linan
在不同的电流密度下测量了闪速烧结稳定阶段氧化锆的电导率。我们发现，稳定阶段的电导率（σ s）高于正常电导率（σ n）在非闪蒸条件下测量，即使焦耳热考虑。较高的电导率归因于电荷载流子浓度的增加。然后使用σ s和σ n之间的差来估计氧空位浓度。结果表明，随着电流密度的增加，初始浓度增加，然后随着电流密度的进一步增加而减小。一个投机性的解释，提出了占这种现象。
The electric conductivity of zirconia in the steady stage of flash sintering is measured under various current densities. We find that the steady stage conductivity (σ s) is higher than the normal conductivity (σ n) measured at non-flashing conditions, even Joule heat is considered. The higher conductivity is ascribed to the increase in charge carrier concentration. The difference between σ s and σ n is then used to estimate the oxygen vacancy concentration. It is found that the concentration increases with increasing current density at beginning and then decreases with further increasing current density. A speculative explanation is proposed to account for this phenomenon.