Effect of oxygen partial pressure on temperature for onset of flash sintering 3YSZ

Effect of oxygen partial pressure on temperature for onset of flash sintering 3YSZ
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氧分压对闪速烧结3YSZ起始温度的影响

DOI:
10.1016/j.jeurceramsoc.2017.09.009
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发表时间:
2018-02
影响因子:
5.7
通讯作者:
Yiguang Wang
Yiguang Wang
中科院分区:
材料科学1区
文献类型:
--
作者:
Dianguang Liu;Yejie Cao;Jinling Liu;Yan Gao;Yiguang Wang

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本文证明,在富氧环境中,氧分压会影响 3 mol% 氧化钇稳定氧化锆 (3YSZ) 的闪速烧结起始温度。闪速烧结实验的氧分压范围为 0.25–1 atm。结果表明,随着氧分压的增加,起始温度升高。根据电导率与温度的关系图,氧分压可能通过改变预闪蒸阶段的电导率来影响起始温度。结合质量作用定律的分析,确定电子传导也可能是闪速烧结预闪蒸阶段的一个关键参数,不包括氧空位传导。
In this paper, it is demonstrated that in an oxygen-enriched environment, the oxygen partial pressure affects the onset temperature of flash sintering of 3 mol% yttria-stabilized zirconia (3YSZ). Flash sintering experiments were performed with oxygen partial pressures in the range of 0.25–1 atm. The results indicate that the onset temperature increased by increasing oxygen partial pressure. According to the plots of the conductivity as a function of temperature, the oxygen partial pressure might affect the onset temperature, by changing the conductivity in the pre-flash stage. Combined to the analysis of the law of mass action, it was established that electron conduction might also represent a critical parameter during the pre-flash stage of flash sintering, excluding the oxygen vacancy conduction.
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