Hydrogen dissolution into Yb-doped SrCeO3

Yamanaka, Shinşuke; Okada, Mizuho; Komatuki, S.; Miyake, Masanobu

doi:10.1016/0925-8388(95)01758-5

Cited by 5 publications

(3 citation statements)

References 8 publications

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“…26 27 The hydrogen dissolution behavior of the perovskite oxide, SrCe 0.95 Yb 0.05 O 3−α was investigated in an oxygenwater vapor environment at temperatures ranging from 500 to 1100°C using the TDS method. 28 The hydrogen solubility was found to decrease as the temperature increased and to increase when the water vapor pressure increased. 28 Using the TIP technique, in our previous studies 8,9 we reported the hydrogen solubility and diffusivity behavior in three different perovskite proton conducting oxides: BaZr 0.9 Y 0.…”

Section: Methodsmentioning

confidence: 99%

“…28 The hydrogen solubility was found to decrease as the temperature increased and to increase when the water vapor pressure increased. 28 Using the TIP technique, in our previous studies 8,9 we reported the hydrogen solubility and diffusivity behavior in three different perovskite proton conducting oxides: BaZr 0.9 Y 0. From our group's previous study, 29 tritium concentration, that is, hydrogen solubility or dissolution was estimated to be around 1.8 mol% and remained almost constant through the temperature range of 400-600°C in 10% Y-doped BaCeO 3 (BaCe 0.9 Y 0.1 O 3−α ).…”

Section: Methodsmentioning

confidence: 99%

“…Studies on polycarbosilanederived SiC ceramic 25 and SiC/SiC composite 26,27 have shown that porosity decreases and mechanical properties improve with the increasing number of PIP cycles. Zhu et al 28 show that increasing pyrolysis temperature and the concentration of SiC fillers in polycarbosilane polymer result in improved mechanical properties in two-dimensional Carbon/ SiC (C/SiC) composites fabricated using the PIP process.…”

Section: Introductionmentioning

confidence: 99%

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Hydrogen isotope dissolution and release behavior in Y‐doped BaCeO₃

2021

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Oxides having a perovskite structure are known to exhibit good proton conductivity in a high-temperature region, which makes them potential candidates in the tritium recovery and purification system of the electrochemical devices of fusion reactors such as hydrogen pumps, hydrogen sensors, and tritium monitoring systems. But the dissolution of hydrogen into the proton conductor and its release behavior is not well known yet. In this study, the dissolution and release behavior of hydrogen was investigated in BaCe 0.9 Y 0.1 O 3−α proton conductor by exposing deuterium gas (D 2 ) and heavy water vapor (D 2 O) at 600 or 700°C for 5 h. The dissolved deuterium amount in the sample was measured using a temperature-programmed desorption analysis (TDS) method. The relationship between the amount of deuterium dissolved in the sample with the exposure pressure was also investigated. At room temperature (RT), the diffusivity of hydrogen (e.g., deuterium) was calculated from the change of the amount of residual hydrogen in the exposed sample due to the change of storage time. The Tritium Migration Analysis Program, Version 4 (TMAP4) simulation code was used to simulate and compare the experimental value of the obtained diffusivity. Although diffusivity at RT has not been reported in the past, the diffusivity is close to the extrapolation value of the literature data. From the comparison of this research results with literature, it may consider that the dominant diffusion mechanism does not change regardless of the temperature range.

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