𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Non-monotonic conductivity relaxation of proton-conducting BaCe0.85Y0.15O3−δ upon hydration and dehydration

✍ Scribed by D.-K. Lim; M.-B. Choi; K.-T. Lee; H.-S. Yoon; E.D. Wachsman; S.-J. Song

Publisher
Elsevier Science
Year
2011
Tongue
English
Weight
831 KB
Volume
36
Category
Article
ISSN
0360-3199

No coin nor oath required. For personal study only.

✦ Synopsis

The electrical and relaxation properties of Y-doped barium cerate (BaCe 0.85 Y 0.15 O 3Àd ; BCY) were studied as a function of both P O2 and P H2O in the temperature range of 600e900 C. The partial conductivities of protons, holes, and oxygen vacancies were successfully calculated, and the activation energy determined for proton transport was 0.29 eV. Twofold nonmonotonic conductivity relaxation behaviors were clearly confirmed in the temperature range of 700 w 800 C during hydration/dehydration. The hydrogen chemical diffusivity at a fixed oxygen partial pressure (P O2 ), DiH , was greater than that of DvH , i.e., the oxygen chemical diffusivity at a fixed P O2 , at all experimental conditions, suggesting that the hydrogen chemical diffusion is always faster than oxygen upon hydration/dehydration in the temperature range studied.

📜 SIMILAR VOLUMES

ChemInform Abstract: Sintering, Chemical
ChemInform Abstract: Sintering, Chemical Stability and Electrical Conductivity of the Perovskite Proton Conductors BaCe0.45Zr0.45M0.1O3- δ (M: In, Y, Gd, Sm).
✍ Jingde Lv; Ling Wang; Dai Lei; Hongxia Guo; R. V. Kumar 📂 Article 📅 2009 🏛 John Wiley and Sons ⚖ 21 KB 👁 1 views

## Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable v