کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7989488 | 1515942 | 2018 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Preparation of Mo nanopowders through hydrogen reduction of a combustion synthesized foam-like MoO2 precursor
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
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چکیده انگلیسی
In this work, Nano-sized Mo particles were fabricated by solution combustion synthesis (SCS) followed by hydrogen reduction. A foam-like MoO2 precursor was first assembled using 20-30â¯nm nanoparticles generated by SCS. Subsequently, hydrogen reduction of the foam-like MoO2 precursor was undertaken to prepare the nano-sized Mo particles. The reduction temperature of the final phases and morphologies of the Mo products were then systematically investigated. The hydrogen reduction mechanism of the foam-like MoO2 precursor was analyzed using thermogravimetry analysis (TG) and H2 temperature programmed reduction with MS analysis (H2-TPR-MS). The results show that the nano-sized and irregularly-shaped 60-80â¯nm Mo particles were successfully synthesized at 600â¯Â°C for 2â¯h. Increasing the temperature to 650â¯Â°C-700â¯Â°C produced larger Mo particles due to sintering of the Mo powder at a higher reduction temperature. Additionally, a Mo2C impurity formed as a result of the carbon-thermal reaction between residual carbon and MoO2 in the presence of hydrogen.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Refractory Metals and Hard Materials - Volume 76, November 2018, Pages 90-98
Journal: International Journal of Refractory Metals and Hard Materials - Volume 76, November 2018, Pages 90-98
نویسندگان
Siyong Gu, Mingli Qin, Houan Zhang, Jidong Ma, Xuanhui Qu,