Fabrication of Electroconductive Si₃N₄–TiN Ceramic from Iron Ore Tailing

Abstract:

Electroconductive Si₃N₄–TiN ceramic was fabricated by pressureless sintering from the chief materials containing high titanium slag and Si₃N₄ powder synthesized by carbonthermal reduction nitridation method using iron ore tailing as raw materials. Phase constitutes and microstructure were analyzed by XRD and SEM. The densification, mechanical properties and electrical conductivity of Si₃N₄–TiN ceramic were also measured. Results show that the sintered samples mainly consist of Si₃N₄ and TiN. Si₃N₄ exhibits rod morphology and the grain sizes are about 1-3mm.TiN shows fine granular morphology with most of grain size being lower than 0.5mm. The electroconductive Si₃N₄–TiN ceramic has optimal properties when it is sintered at 1550°C for 2h using initial raw materials containing 20wt% TiO₂. The sintered sample’s bulk density, hardness, flexure strength and room electrical resistivity are 2.79 g·cm^-3, 8.23GPa, 66 MPa and 7.1×10^-2W·cm, respectively.

• Periodical: Advanced Materials Research (Volumes 284-286)
• Pages: 1067-1070
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.284-286.1067
• Online since: July 2011
• Authors: Shu Hui Zhang, Zhi Qiang Kang, Qing Lü, Jie Li, Xiao Jie Liu
• Keywords: Electrical Conductivity, Electroconductive Ceramic, Iron Ore Tailing, Si₃N₄–TiN

References

[1] C.C. Liu: Mater. Sci. Eng Vol.A3639 (2003), P. 221.

[2] K. Liu, D. Reynaerts, B. Lauwers: CIRP Annals - Manufacturing Technology Vol.58 (2009), P.217.

[3] Z.Q. Guo, G. Blugan, R. Kirchner, M. Reece, T Graule, J. Kuebler: Ceram. Int. Vol.33 (2007), P.1223.

[4] J. Křest'an, P. Šajgalík, Z. Pánek: J. Eur. Ceram. Soc. Vol.24 (2004), P.791.

[5] H. Arik, S. Saritas, M. Gündüz: J. Mater. Sci. Vol.34 (1999), P.836.

[6] S.H. Zhang, X.X. Xue, Q. Lu, D.W. Huang: Iron and Steel Vol.43 (2008), P.85 (in Chinese).

[7] I.D. Gnilitsa, Y.A. Kril: Powd. Metall. Met. Ceram. Vol.44 (2005), P. 441.

[8] Z.X. Chen: Mater. Rev. (1993), P.29 (In Chinese).

[9] B.T. Lee, Y.J. Yoon, K.H. Lee: Mater. Lett. Vol.47 (2001), P. 71.

[10] F. J. Narciso-Romero, F. Rodríguez-Reínoso: J. Mater. Sci. Vol.31 (1996), P.779.

[11] T. Jiang, X.X. Xue, P.N. Duan, G. Du: ACTA Metall. Sinica Vol.43 (2007), P.131 (In Chinese).

[12] H. Zou, C.P. Zou: China Nuclear Sci. and Tech. Report (2003), P. 238 (In Chinese).

[13] B.Y Liang, M.Z. Wang: J. Yanshan Univ. Vol.34 (2010), P,204(In Chinese).

[14] R.S. Wang, S.J. Yu, S.W Yao: Ceramics (2009), P.18 (In Chinese).

[15] S.Q. Wang, C.G. Zhang, S.W. Wang, G.J. Qi, F. Cao, H.F. Hu, Y.G. Jiang: Mater. Rev. Vol.20(S1) (2006), P.459 (In Chinese).