کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1298240 | 1498386 | 2007 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Proton diffusion in LaSrScO3 single crystals studied by in-situ infrared absorption spectroscopy
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The diffusivity of protons in Sr2+-doped LaScO3 single crystals was determined by in-situ infrared absorption spectroscopy. It was found that the high-temperature absorption spectrum shows a broad peak due to O-H stretching bands, which differs from that observed at room temperature. The diffusion coefficient was evaluated by two different methods: (1) suddenly changing the water vapor partial pressure and (2) exchanging H2O and D2O-saturated atmospheres. The diffusion and the activation energy are limited mainly by the diffusivity of oxygen ion vacancies based on the first measurement method at high temperatures. The proton self-diffusion coefficients were obtained by using the second measurement method, and the activation energy is 0.51Â eV.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Ionics - Volume 178, Issues 27â28, November 2007, Pages 1507-1511
Journal: Solid State Ionics - Volume 178, Issues 27â28, November 2007, Pages 1507-1511
نویسندگان
J. Liu, H. Yugami,