Additive-Assisted Nitridation to Synthesize Si3N4 Nanomaterials at a Low Temperature |
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| Authors: | Fengxia Li Li Fu Xiaojian Ma Changhui Sun LianCheng Wang Chunli Guo Yitai Qian Yitai Qian |
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| Affiliation: | Key Laboratory of Colloid and Interface Chemistry (Shandong University), Ministry of Education, Jinan 250100, China;
Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei 230026, Anhui, China |
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| Abstract: | Starting from Si powder, NaN3 and different additives such as N -aminothiourea, iodine, or both, Si3N4 nanomaterials were synthesized through the nitridation of silicon powder in autoclaves at 60°–190°C. As the additive was only N -aminothiourea, β-Si3N4 nanorods and α-Si3N4 nanoparticles were prepared at 170°C. If the additive was only iodine, α-Si3N4 dendrites with β-Si3N4 nanorods were obtained at 190°C. However, when both N -aminothiourea and iodine were added to the system of Si and NaN3, the products composed of β-Si3N4 nanorods and α, β-Si3N4 nanoparticles could be prepared at 60°C. |
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