Additive-Assisted Nitridation to Synthesize Si₃N₄ Nanomaterials at a Low Temperature

Authors: Li, Fengxia¹; Fu, Li¹; Ma, Xiaojian¹; Sun, Changhui¹; Wang, LianCheng¹; Guo, Chunli¹; Qian, Yitai^{1, 2}

Source: Journal of the American Ceramic Society, Volume 92, Number 2, February 2009 , pp. 517-519(3)

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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.

Document Type: Research article

DOI: http://dx.doi.org/10.1111/j.1551-2916.2008.02845.x

Affiliations: 1: Key Laboratory of Colloid and Interface Chemistry (Shandong University), Ministry of Education, Jinan 250100, China 2: Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei 230026, Anhui, China

Publication date: 2009-02-01