کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9636480 | 465854 | 2005 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Kinetics of SiO vapor ammonolysis for nano-sized silicon nitride powder synthesis
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The kinetics of SiO vapor ammonolysis to produce nano-sized silicon nitride powder was studied with an 80-mm-diameter vertical tubular flow reactor operated at temperatures ranging from 1300 °C to 1400 °C. The molar feed rate of NH3 was maintained 2-3 orders of magnitude in excess of stoichiometric ratio over SiO. The rate of reaction to form nano-sized powder was represented by a pseudo-first-order rate expression with respect to SiO concentration, independently of NH3 concentration. The temperature dependency of the pseudo-first-order rate constant was determined. The effects of mean residence time as well as the reaction temperature on the growth of nano-sized particles were investigated, and the minimum residence time to produce particles of critical size was estimated.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Powder Technology - Volume 156, Issues 2â3, 23 August 2005, Pages 73-82
Journal: Powder Technology - Volume 156, Issues 2â3, 23 August 2005, Pages 73-82
نویسندگان
Panut Vongpayabal, Shoichi Kimura,