Synthesis and Characterization of α-Phase Silicon Nitride Powders by Direct Nitridation

Abstract:

Using silicon powders as raw materials, adding nano-silicon nitride as a diluent and NH₄Cl₃ and FeCl₃ as catalysts, α-phase silicon nitride powders were prepared by direct nitridation method. The silicon powders were first milled with 20% α-Si₃N₄ and 4% NH₄Cl₃ for 30 minutes. Then the mixture was heat-treated at 1300°C for 1 hour in the pure nitrogen gas. The phases and their content of the as-prepared product were detected by X-ray diffraction (XRD) and the microstructure was studied by scanning electron microscope (SEM). The results showed that the product mainly consisted ofα-Si₃N₄ with a mass fraction over 92% and were submicron-sized particles．

• Periodical: Advanced Materials Research (Volumes 631-632)
• Pages: 434-436
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.631-632.434
• Online since: January 2013
• Authors: Jiu Ming Liu, Jian Lei Wang, Shu Xia Ren
• Keywords: Powder, Silicon Nitride, α-Phase

References

[1] J.J. Melendez-Martınez, A. Domınguez-Rodrıguez. Progress in Materials Science, Vol. 49 (2004), pp.19-107.

[2] Backhaus-Ricoult M, Guerin V, Huntz A-M and Urbanovich V S. J Am Ceram Soc., Vol. 85 (2002), pp.385-392.

[3] Riley F L, Silicon nitride and related materials. J. Am. Ceram. Soc. Vol. 83(2000), pp.245-265.

[4] Oba F, Tatsumi K, Tanaka I and Adachi H. J. Am. Ceram. Soc. Vol. 85(2002) , pp.97-102.

[5] A. de Pablos, J. Bermudo and M. Isabel Osendi: J. Am. Ceram. Soc., Vol. 84(2001), pp.1033-1036.

[6] G. Ziegler, J. Heinrich and G. Wotting: J. Mater. Sci., Vol. 22(1987), pp.3041-3086.