MSCE  Vol.2 No.10 , October 2014
Salt-Assisted SHS Synthesis of Aluminium Nitride Powders for Refractory Applications
ABSTRACT

Powders of aluminum nitride can be prepared by self-sustain high-temperature synthesis (SHS) between aluminum and nitrogen but its high exothermic effect causes melting and evaporation of aluminum and low efficiency of such reaction. A presence of inorganic salt in the starting powder mixture can decrease a heat evolved in the SHS reaction, hinders melting and coalescence of aluminum, and facilitates penetration of nitrogen into interior of a powder bed. Mixtures of alumina powders with different grain sizes and different amounts of aluminum carbonate were subjected to the SHS reaction under 0.05, 0.1 or 1 MPa nitrogen. The powders were composed of aluminum nitride, unreacted aluminum, aluminum oxynitride and in some cases corundum and aluminum oxycarbonate. The finale effects are strongly dependent on the amount of the salt, a grain size of aluminum and a nitrogen pressure.


Cite this paper
Wilmański, A. , Bućko, M. , Pędzich, Z. and Szczerba, J. (2014) Salt-Assisted SHS Synthesis of Aluminium Nitride Powders for Refractory Applications. Journal of Materials Science and Chemical Engineering, 2, 26-31. doi: 10.4236/msce.2014.210004.
References
[1]   Pierson, H.O. (1996) Handbook of Refractory Carbides and Nitrides, Properties, Characteristics, Processing and Applications. Elsevier Science.

[2]   Wang, P.L., Sun, W.Y. and Yan, D.S. (1999) Mechanical Properties of AlN-Polytypoids—15R, 12H and 21R. Materials Science and Engineering: A, 272, 351-356. http://dx.doi.org/10.1016/S0921-5093(99)00500-6

[3]   Slack, G.A. (1973) Nonmetallic Crystals with High Thermal Conductivity. Journal of Physics and Chemistry of Solids, 34, 321-335. http://dx.doi.org/10.1016/0022-3697(73)90092-9

[4]   Sato, T., Kanno, Y. and Shimada, M. (1986) Corrosion of SiC, Si3N4 and AlN in Molten K2SO4-K2CO3 Salts. International Journal of High Technology Ceramics, 2, 279-290. http://dx.doi.org/10.1016/0267-3762(86)90021-4

[5]   Kartavykh, A.V., Tcherdyntsev, V.V. and Zollinger, J. (2009) TiAl-Nb Melt Interaction with AlN Refractory Crucibles”, Materials Chemistry and Physics, 116, 300-304. http://dx.doi.org/10.1016/j.matchemphys.2009.03.032

[6]   Himpel, G., Herrmann, M., H?hn, S. and Klinger, M. (2014) High-Temperature Corrosion of Aluminium Nitride Ceramics by Coal Ashes. Journal of the European Ceramic Society, 34, 267-276. http://dx.doi.org/10.1016/j.jeurceramsoc.2013.08.030

[7]   Yoshimura, H.N., Abreu, A.P., Molisani, A.L., de Camargo, A.C., Portela, J.C.S. and Narita, N.E. (2008) Evaluation of Aluminum Dross Waste as Raw Material for Refractories. Ceramics International, 34, 581-591. http://dx.doi.org/10.1016/j.ceramint.2006.12.007

[8]   Pichlbauer, S., Harmuth, H., Lencés, Z. and Sajgalík, P. (2012) Preliminary Investigations of the Production of MgAlON Bonded Refractories. Journal of the European Ceramic Society, 32, 2013-2018. http://dx.doi.org/10.1016/j.jeurceramsoc.2011.10.036

[9]   Bu?ko, M.M., Domaga?a, J. and Lach, R. (2014) Consoli-dation of Aluminium Oxynitride Powders Using Hydrolysis of Aluminium Nitride. Key Engineering Materials, 602-603, 170-174. http://dx.doi.org/10.4028/www.scientific.net/KEM.602-603.170

[10]   Haussonne, J.M., Lostec, J. and Bertot, J.P. (1993) A New Synthesis Process for AlN. American Ceramic Society Bulletin, 72, 84-90.

[11]   Cho, Y.W. and Charles, J.A. (1991) Synthesis of Nitrogen Ceramic Powders by Carbothermal Reduction and Nitridation. III: Aluminium Nitride. Materials Science and Technology, 7, 495-504. http://dx.doi.org/10.1179/mst.1991.7.6.495

[12]   Li, H.D., Zou, G.T., Wang, H., Yang, H.B., Li, D.H. and Li, M.H. (1998) Synthesis and Infrared Study of Nanosized Aluminum Nitride Powders Prepared by Direct Current Arc Plasma. Journal of Physical Chemistry B, 102, 8692-8695. http://dx.doi.org/10.1021/jp981486x

[13]   Subrahmanyan, J. and Visayakumar, M. (1992) Review: Self-Propagating High-Temperature Synthesis. Journal of Materials Science, 27, 6249-6273.

[14]   Rosenband, V. and Gany, A. (2004) Activation of Combustion Synthesis of Aluminum Nitride Powder. Journal of Materials Processing Technology, 147, 197-203. http://dx.doi.org/10.1016/j.jmatprotec.2003.12.017

[15]   Sakurai, T., Yamada, O. and Miyamoto, Y. (2006) Combustion Synthesis of Fine AlN Powder and its Reaction Control. Materials Science and Engineering A, 416, 40-44. http://dx.doi.org/10.1016/j.msea.2005.09.111

[16]   Zientara, D., Bu?ko, M.M. and Lis, J. (2007) Alon-Based Materials Prepared by SHS Technique. Journal of the European Ceramic Society, 27, 775-779. http://dx.doi.org/10.1016/j.jeurceramsoc.2006.04.008

 
 
Top