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Isotopic effect of proton conductivity in gadolinium sesquioxide
Fusion Engineering and Design ( IF 1.9 ) Pub Date : 2021-04-13 , DOI: 10.1016/j.fusengdes.2021.112555
M. Khalid Hossain , K. Kawaguchi , K. Hashizume

Due to the higher hydrogen solubility and diffusivity, gadolinium sesquioxide (Gd2O3) could be expected as a proton conductive material. In this study, monoclinic Gd2O3 was used to evaluate the possible proton conductivity in Ar (σAr), Ar+4% H2 (σH2), Ar+4% D2 (σD2), Ar+H2O (σH2O), Ar+D2O (σD2O), and O2 (σO2) atmospheres in the temperature range from 500°C to 1000°C, to understand its possible application in the DT fuel system of a nuclear fusion reactor. At all temperatures, the conductivity σD2 was lower than that of the σH2. Similarly, the σD2O was always lower than that of the σH2O. The isotope dependence was appreciable at higher temperatures, indicating that Gd2O3 is a proton-conductive oxide at elevated temperatures. However, much improvement is required for the use of Gd2O3 in the DT fuel recovery, analysis, and purification system of fusion reactors.



中文翻译:

倍半氧化g中质子传导性的同位素效应

由于较高的氢溶解度和扩散性,倍半氧化g(Gd 2 O 3)有望作为质子传导材料。在这项研究中,单斜Gd 2 O 3用于评估Ar中可能的质子电导率(σ氩气),Ar + 4%H 2σH2个),Ar + 4%D 2σd2个),Ar + H 2 O(σH2个Ø),Ar + D 2 O(σd2个Ø)和O 2σØ2个)温度范围在500°C至1000°C之间,以了解其在核聚变反应堆DT燃料系统中的可能应用。在所有温度下,电导率σd2个 低于 σH2个。同样,σd2个Ø 总是低于 σH2个Ø。同位素依赖性在较高温度下是明显的,表明Gd 2 O 3在升高的温度下是质子传导性氧化物。但是,在聚变反应堆的DT燃料回收,分析和纯化系统中使用Gd 2 O 3需要进行很大的改进。

更新日期:2021-04-14
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