Hostname: page-component-586b7cd67f-l7hp2 Total loading time: 0 Render date: 2024-11-26T10:59:36.977Z Has data issue: false hasContentIssue false
  • English
  • Français

Reaction mechanism in combustion synthesis of α-Si3N4 powder using NaN3

Published online by Cambridge University Press:  31 January 2011

Shyan-Lung Chung ,
Chih-Wei Chang  and
F.J. Cadete Santos Aires
Shyan-Lung Chung*
Affiliation:
Department of Chemical Engineering, National Cheng Kung University, Tainan 70101, Taiwan, Republic of China
Chih-Wei Chang
Affiliation:
Department of Chemical Engineering, National Cheng Kung University, Tainan 70101, Taiwan, Republic of China
F.J. Cadete Santos Aires
Affiliation:
Institut de Recherches sur la Catalyse, National Center for Scientific Research, Villeurbanne Cedex 69626, France
*
a)Address all correspondence to this author. e-mail: [email protected]
Get access

Abstract

A combustion synthesis method for the synthesis of α-Si3N4 from a reactant compact composed of Si, NaN3, and NH4X and wrapped up with an igniting agent was investigated. Wrapping the reactant compact with the igniting agent (i.e., a mixture of Ti and C powders) was found necessary for the synthesis of Si3N4. In addition to NH4Cl, which was considered previously to function as a catalytic agent, other ammonium halides (i.e., NH4F, NH4Br, and NH4I) were found to be capable of catalyzing the synthesis reaction with NH4Cl being the most effective. Si3N4 could not be produced when NaN3 was replaced by C3H6N6. NaN3 was thus considered to exert an essential effect on the combustion synthesis reaction other than functioning as a solid-state nitrogen source as considered previously. It was proposed that Na vapor produced by decomposition of NaN3 reduces SiXx (formed by reaction of Si and NH4X), promoting the nitridation reaction to form Si3N4. NaN3 thus plays a role as a reducing agent in the synthesis reaction.

Keywords

Combustion synthesis (SHS)Nitride
Type
Articles
Information
Journal of Materials Research , Volume 23 , Issue 10 , October 2008 , pp. 2720 - 2726
Copyright
Copyright © Materials Research Society 2008

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1Riley, F.L.: Silicon nitride and related materials. J. Am. Ceram. Soc. 83, 245 2000CrossRefGoogle Scholar
2Bai, Y-J., Bian, J., Wang, C-G., Zhu, B., Qi, Y-X., Wang, Y-X., Liu, Y-X., Geng, G-L.: One step convenient synthesis of crystalline β-Si3N4. J. Mater. Chem. 15, 4832 2005CrossRefGoogle Scholar
3Methivier, C., Massardier, J., Bertolini, J.C.: Pd/Si3N4 catalysts: Preparation, characterization and catalytic activity for the methane oxidation. Appl. Catal. Gen. 182, 337 1999CrossRefGoogle Scholar
4Cano, I.G., Rodríguez, M.A.: Synthesis and sintering of Si3N4 obtained by the SHS process. Ind. Eng. Chem. Res. 45, 1277 2006CrossRefGoogle Scholar
5Cullite, B.D.: Elements of X-Ray Diffraction Addison-Wesley London, UK 1978Google Scholar
6Real, C., Alcalá, M.D., Criado, J.M.: Synthesis of silicon nitride from carbothermal reducing of rice husks by the constant rate thermal analysis (CRTA) method. J. Am. Ceram. Soc. 87, 75 2004CrossRefGoogle Scholar
7Lee, W-C., Chung, S-L.: Combustion synthesis of Si3N4 powder. J. Mater. Res. 12, 805 1997CrossRefGoogle Scholar
8Weston, C.W., Papcun, J.R., Dery, M.: Ammonium compounds in Kirk-Othmer Encyclopedia of Chemical Technology John Wiley & Sons 2008Google Scholar
9Lee, W-C., Tu, C-L., Weng, C-Y., Chung, S-L.: A novel process for combustion synthesis of AIN powder. J. Mater. Res. 10, 774 1995CrossRefGoogle Scholar
10Munir, Z.A.: Synthesis of high temperature materials by self-propagation combustion methods. Ceram. Bull. 67(2), 342 1988Google Scholar
11Shim, G., Park, J-S., Cho, S-W.: Combustion synthesis of AlN with melamine as an additive. J. Mater. Res. 21, 747 2006CrossRefGoogle Scholar
12Steffens, K.L., Zachariah, M.R.: Optical and modeling studies of sodium/halide reactions for the formation of titanium and boron nanoparticles. Chem. Mater. 8, 1871 1996CrossRefGoogle Scholar
13Turkdogan, E.T., Bills, P.M., Tippett, V.A.: Silicon nitride: Some physico-chemical properties. J. Appl. Chem. 8, 296 1958CrossRefGoogle Scholar
14Engineering Property Data on Selected Ceramics Vol. 1 Nitrides Metal and Ceramics Information Center Battelle Columbus Laboratories Columbus, OH 1976Google Scholar
15Cao, Y-G., Ge, C-C., Zhou, Z-J., Li, J-T.: Combustion synthesis of α-Si3N4 whiskers. J. Mater. Res. 14, 876 1999CrossRefGoogle Scholar
16Cano, I.G., Baelo, S.P., Rodriguez, M.A., Aza, S.D.: Self-propagating high temperature-synthesis of Si3N4: Role of ammonium salt addition. J. Eur. Ceram. Soc. 21, 291 2001CrossRefGoogle Scholar
17Yang, Y., Chen, Y-X., Lin, Z-M., Li, J-T.: Synthesis of α-Si3N4 using low-α-phase Si3N4 diluent by the seeding technique. Scr. Mater. 56, 401 2007CrossRefGoogle Scholar