کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7993394 | 1516151 | 2018 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Thermodynamic stability of SrThF6(cr) and BaThF6(cr)
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In the present paper we report the standard molar Gibbs energy of formation of SrThF6 and BaThF6 measured by gas equilibration method employing transpiration technique. The chemical equilibrium between MThF6 (cr) (Mâ¯=â¯Sr, Ba) and moisture: MThF6(cr)+2H2O(g)=MF2(cr)+ThO2(cr)+4HF(g) has been employed to determine thermodynamic stability of these compounds. The equilibrium constant 'Kp' at different temperatures was calculated using partial pressure of HF(g) measured at a fixed vapour pressure of water p(H2O). The Gibbs energy of formation for SrThF6(cr) and BaThF6(cr) could be expressed as: ÎfG°m (SrThF6, cr)(±8â¯kJâ¯molâ1) = â3288 + 0.3776 T and ÎfG°m (BaThF6, cr) (±7â¯kJâ¯molâ1) = â3292 + 0.378T. The isobaric heat capacity of these compounds was measured employing differential scanning calorimetric technique. Based on the experimental results thermodynamic functions for SrThF6 and BaThF6 have been generated.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 743, 30 April 2018, Pages 658-665
Journal: Journal of Alloys and Compounds - Volume 743, 30 April 2018, Pages 658-665
نویسندگان
Rimpi Dawar, S. Phapale, S. Kolay, M. Basu, R. Mishra, A.K. Tyagi,