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Shahsavari, Elnaz, Zamani, Cyrus, Ahmadi Dermeni, Hossein, Hadian, Ali Mohammad, Hadian, Amir. (1399). Cryomilling-Assisted Synthesis of Nanostructured Silicon. , 53(2), 158-165. doi: 10.22059/jufgnsm.2020.02.07
Elnaz Shahsavari; Cyrus Zamani; Hossein Ahmadi Dermeni; Ali Mohammad Hadian; Amir Hadian. "Cryomilling-Assisted Synthesis of Nanostructured Silicon". , 53, 2, 1399, 158-165. doi: 10.22059/jufgnsm.2020.02.07
Shahsavari, Elnaz, Zamani, Cyrus, Ahmadi Dermeni, Hossein, Hadian, Ali Mohammad, Hadian, Amir. (1399). 'Cryomilling-Assisted Synthesis of Nanostructured Silicon', , 53(2), pp. 158-165. doi: 10.22059/jufgnsm.2020.02.07
Shahsavari, Elnaz, Zamani, Cyrus, Ahmadi Dermeni, Hossein, Hadian, Ali Mohammad, Hadian, Amir. Cryomilling-Assisted Synthesis of Nanostructured Silicon. , 1399; 53(2): 158-165. doi: 10.22059/jufgnsm.2020.02.07

Cryomilling-Assisted Synthesis of Nanostructured Silicon

Journal of Ultrafine Grained and Nanostructured Materials
دوره 53، شماره 2، اسفند 2020، صفحه 158-165    اصل مقاله (4.69 M)
نوع مقاله: Research Paper
شناسه دیجیتال (DOI): 10.22059/jufgnsm.2020.02.07
نویسندگان
Elnaz Shahsavari1؛ Cyrus Zamani* 1؛ Hossein Ahmadi Dermeni1؛ Ali Mohammad Hadian1؛ Amir Hadian2
1School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, Tehran, Iran.
2Empa, Swiss Federal Laboratories for Materials Science & Technology, Laboratory for High Performance Ceramics, 8600, Dübendorf, Switzerland.
چکیده
Rice husk-derived nanostructured silicon is synthesized using a cryogenic milling system. After calcination of rice husk at 700C, obtained silica was mixed with magnesium powder via cryomilling at -100°C for 1 to 6 hours, followed by a magnesiothermic reduction heat treatment. Electron microscopy results revealed the quality of mixing process with no chemical reaction occurred during milling as confirmed by X-ray diffraction analysis. Prolonged cryomilling not only improved the distribution of the powders but also provided a highly active magnesium powder inside the mixture. As a result, a final product with larger total pore volume and higher surface area was obtained. Finally, cryomilling for 6 hours combined with magnesiothermic in powder form (as compared to pelletized material) resulted in the highest total pore volume of 0.258 cm3.g-1 (corresponding to average pore diameter of 20.42 nm) and specific surface area of 50.44 m2.g-1. The average crystallite size of all samples is in the range of 45.57 to 53.28 nm,thus confirming formation of the nanostructured silicon.
کلیدواژه‌ها
Rice husk؛ nanostructured silica؛ nanostructured silicon؛ cryomilling؛ magnesiothermic reduction
مراجع

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