کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9781695 | 1511635 | 2005 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of reduction on graphitization behavior of mesophase pitch-derived carbon fibers
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
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چکیده انگلیسی
Chemically reduced solid-state mesophase pitch carbon fibers below 1000 °C in a flow of hydrogen gas were treated up to 3000 °C in an argon atmosphere in order to evaluate the effect of hydrogen on the graphitization behavior. Major phenomena observed during the reduction process are chemical transformation from an ether to a hydroxyl group (corresponding to the rupture of the C-O-C bond) and their subsequent evolution as gases. Finally, oversupplied hydrogen might be utilized to satisfy the dangling bond. For the sample heat treated at 3000 °C, the low crystallinity indicates that hydrogen atoms covalently bonded to the end planes of graphitic layers act as an effective barrier to crystallite growth.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Physics and Chemistry of Solids - Volume 66, Issue 6, June 2005, Pages 984-989
Journal: Journal of Physics and Chemistry of Solids - Volume 66, Issue 6, June 2005, Pages 984-989
نویسندگان
Y.A. Kim, H. Muramatsu, M. Kojima, T. Hayashi, C. Kim, M. Endo, M.S. Dresselhaus,