کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9761752 | 1498427 | 2005 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A transient thermogravimetric study on the oxygen permeation at high temperature of the superconducting material YBa2Cu3O7âδ
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: A transient thermogravimetric study on the oxygen permeation at high temperature of the superconducting material YBa2Cu3O7âδ A transient thermogravimetric study on the oxygen permeation at high temperature of the superconducting material YBa2Cu3O7âδ](/preview/png/9761752.png)
چکیده انگلیسی
The solid-gas phase oxygen ions exchange of the superconducting material YBa2Cu3O7âδ (YBCO) powder at high temperature subject to an instantaneous change of surrounding gas between pure oxygen and nitrogen was studied by a transient thermogravimetric analysis (TGA) method. The dependence of equilibrium oxygen vacancy of YBCO sample on surrounding partial oxygen pressure at temperature region 500-800 °C was measured by a homemade static oxygen absorption instrument. A rapid weight gain in the oxygen absorption period and a slow weight loss in the oxygen desorption period were observed in the transient experiment. The surface reaction rate constants both for the oxygen absorption and desorption periods were calculated by considering the surface reaction as the rate-limiting step. The result shows that rate constant for the oxygen desorption period is much smaller than that of the oxygen absorption period.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Ionics - Volume 176, Issues 5â6, 14 February 2005, Pages 487-494
Journal: Solid State Ionics - Volume 176, Issues 5â6, 14 February 2005, Pages 487-494
نویسندگان
Jie Hu, Xing Hu, Haoshan Hao, Lanjing Guo, Hongzhang Song, Delin Yang,