کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
11029551 | 1646493 | 2018 | 22 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Thermodynamic properties over (GdAl3+GdAl2) of GdAl system: AÂ high temperature mass spectrometric study
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی هسته ای و مهندسی
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چکیده انگلیسی
Knudsen effusion mass spectrometric studies were conducted on (GdAl2+GdAl3) two phase region of GdAl system over the range of temperature 1131-1258â¯K. Al(g) was found to be the neutral species observed over the equilibrium vapour. The partial pressure of Al (g) measured as a function of temperature over this two phase region yielded the pressure - temperature (p-T) relation: log(pAl (g)/Pa) = â (18743 ± 213)/T + (12.61 ± 0.18) (1131-1258 K). Using this relation, the standard enthalpy of reaction GdAl3(s)â¯=â¯GdAl2(s) + Al(g) and subsequently the standard enthalpy of formation of GdAl2(s) were derived to be 354.6â¯Â±â¯17.1 and â148.7â¯Â±â¯17.1 (kJâ¯molâ1), respectively. Also an analytical expression for the Gibbs free energy of formation of GdAl2(s) that could be represented as ÎfGT,GdAl2(s)° = â (179.2 ± 4.4) + (0.0470 ± 0.0039) T (kJ molâ1) (1131-1258â¯K) was deduced. The vaporisation studies are being reported for the first time.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Nuclear Materials - Volume 511, 1 December 2018, Pages 480-486
Journal: Journal of Nuclear Materials - Volume 511, 1 December 2018, Pages 480-486
نویسندگان
Suranjan Bera, P. Manikandan, V.V. Trinadh, S. Nedumaran, T.S. Lakshmi Narasimhan, K. Ananthasivan,