کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1625388 1516428 2008 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effects of mechanical activation on dehydrogenation of the lithium amide and lithium hydride system
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Effects of mechanical activation on dehydrogenation of the lithium amide and lithium hydride system
چکیده انگلیسی

The dependence of the dehydriding reaction of the LiNH2 and LiH mixture on the degree of mechanical activation was investigated. Different degrees of mechanical activation were obtained via different conditions of high-energy ball milling. The enhanced reaction kinetics was related to changes in the characteristics of the powder mixtures induced by high-energy ball milling. The more mechanical activation, the more reduction in the onset, peak, and completion temperatures for the dehydriding reaction. Mechanical activation could lead to a decrease in the activation energy of the dehydriding reaction. A 60% reduction in the activation energy was achieved by high-energy ball milling at room temperature for 24 h. High-energy ball milling also effectively prevented escaping of NH3 from the LiNH2 and LiH system. A proposal on dual roles of LiH was put forward to explain the mechanism of the dehydriding reaction and all of the phenomena observed in this study.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 448, Issues 1–2, 10 January 2008, Pages 263–271
نویسندگان
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