An Erda Study on Proton Migration Induced by Electric Potential in SrZrO 3 ,SrCeO 3 and BaCeO 3 Oxides:Measurements of Proton Transport Number and Proton Diffusivity
An Erda Study on Proton Migration Induced by Electric Potential in SrZrO 3 ,SrCeO 3 and BaCeO 3 Oxides:Measurements of Proton Transport Number and Proton Diffusivity
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SrZrO 3 、SrCeO 3 和BaCeO 3 氧化物中电势诱导质子迁移的Erda研究：质子传输数和质子扩散率的测量
DOI：
10.1557/proc-513-209
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发表时间：
1998
期刊：
影响因子：
--
通讯作者：
M. Ishigame
中科院分区：
文献类型：
--
作者：
A. Kunimatsu;T. Arai;K. Takahiro;S. Nagata;S. Yamaguchi;Y. Akiyama;N. Sata;M. Ishigame
在2 5~2 2 0℃的外加电势下，研究了在受主掺杂的SrZrO3、SrCeO3和BaCeO3氧化物中溶解的质子的迁移情况。溶解在这些氧化物中的质子迁移到阴极，当阴极材料具有很好的吸氢能力时，它们被捕获在那里。用高能4He束，用ERDA法可以测量阴极中积累的氢量。我们在监测流过氧化物样品的直流电流的同时，测量了阴极中的氢气量。质子输运数是由阴极中的氢气数量与通过样品的总电荷数量的比率确定的。用质子输运数和样品中的质子浓度来估算质子的扩散系数。
Migration of protons dissolved in acceptor doped SrZrO 3 , SrCeO 3 and BaCeO 3 oxides has been examined under an applied electric potential over a range of temperature from 25 to 220°C. Protons which dissolved in these oxides migrated to the cathode, and they were trapped there when the cathode material had a good ability to getter the migrating hydrogen. The amount of hydrogen accumulated in the cathode could be measured by the ERDA method using a highenergy 4 He beam. We measured the amount of hydrogen in the cathode while monitoring the dc current passed through the oxide specimen. The proton transport number was determined from the ratio of the number of hydrogen in the cathode to the total numbers of charge through the specimen. The diffusion coefficient of proton was evaluated using the proton transport number and proton concentration in the specimen.