Phase Behavior Analysis of Low-Grade Bauxite and Rutile by Carbothermal Reduction-Nitridation

Abstract:

In this study, β-Sialon/Al₂O₃/TiN diphase powder was synthesized using low-grade bauxite and rutile via carbothermal reduction-nitridation. The phase transitions of low-grade bauxite and rutile in the carbothermal reduction and nitridation process were analyzed by XRD, SEM and EDS. The effects of different reaction parameters such as reaction temperature, rutile addition on the phase composition and microstructure of products were analyzed. The results showed that β-Sialon/Al₂O₃/TiN powder was prepared using low-grade bauxite and rutile as raw materials and coke as reducing agent by carbothermal reduction-nitridation reaction in flowing nitrogen atmosphere of 0.03 MPa at 1350-1375 °C, for 4 h.

• Periodical: Advanced Materials Research (Volume 624)
• Pages: 239-243
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.624.239
• Online since: December 2012
• Authors: Tao Yang, Yan Gai Liu, Ding Yun Ye, Qi Wang, Zhao Hui Huang, Ming Hao Fang
• Keywords: CrN, Low Grade Bauxite, Phase Behaviour, Rutile

References

[1] X. H. Du, G.R. Zhang, Z.T. Sui. The structure of Sialon ceramics.China Ceram., 33 (1997) 34-37.

[2] H.J. Zhang, B. Han, Z.J. Liu. Preparation and oxidation of bauxite-based β-Sialon-bonded SiC composite. Mater. Res., 41 (2006) 1681–1689.

DOI: 10.1016/j.materresbull.2006.02.027

[3] Z. Tatli, A. Demir, R. Yilmaz, et al. Effects of processing parameters on the production of β-SiAlON powder from kaolinite. J. Eur. Ceram. Soc., 27 (2007) 743-747.

[4] M. Vlasova, V.B. Vinokurov, O.N. Grigor'ev, et al. Features of SiAlON synthesis from kaolin. Mater. Sci. Eng. A, A366 (2004) 325–331.

[5] X. J. Liu, X.W. Sun, J.J. Zhang, et al. Fabrication of β-Sialon powder from kaolin. Mater. Res., 38 (2003) 1939-1948.

[6] P. K. Panda, L. Mariappan, T.S. Kannan. Carbothermal reduction of kaolinite under nitrogen atmosphere. Ceram. Int., 26 (2000) 455-461.

DOI: 10.1016/s0272-8842(99)00068-1

[7] M. Panneerselvam, K.J. Rao. A microwave method for the preparation and sintering of β'-SiAlON. Mater. Res., 38 (2003) 663-674.

DOI: 10.1016/s0025-5408(02)01071-1

[8] Y. Sugahara, K. Kuroda, C. Kato. Synthesis of β-Sialon from a Montmorillonite-Polyacrylonitrile Intercalation Compound by Carbothermal Reductionz. J. Am. Ceram. Soc., 67 (1984) 247–248.

DOI: 10.1111/j.1151-2916.1984.tb19499.x

[9] J. Krˇ{TTP}711 est'an, P. Sˇ{TTP}711 ajgalı´k, Z. Pa´nek Carbothermal reduction and nitridation of powder pyrophyllite raw material. J. Eur. Ceram. Soc., 24 (2004) 791–796.

DOI: 10.1016/s0955-2219(03)00335-2

[10] I.A. Rahman, M.I. Saleh. The formation of β-sialon in the carbothermal reduction of digested rice husks. Mater. Lett., 23 (1995) 157-161.

DOI: 10.1016/0167-577x(95)00002-x

[11] L.H. Xu, F. Lian, H. Zhang. Optimal design and preparation of beta-Sialon multiphase materials from natural clay. Mater. Des., 27 (2006) 595–600.

DOI: 10.1016/j.matdes.2004.12.017

[12] F.J. Li, T. Wakihara, J. Tatami. et al. Synthesis of β-SiAlON powder by carbothermal reduction- nitridation of zeolites with different compositions. J. Eur. Ceram. Soc., 27 (2007) 2535-2540.

DOI: 10.1016/j.jeurceramsoc.2006.08.018

[13] X.Y. Luo, J.L. Sun, C.J. Deng, et al..Synthesis of β-Sialon from coal gangue. J. Mater. Sci. Technol., 19 (2003) 93-96.

[14] K. J. D. Mackenzie, R. H. Meinhold, G. V. White, et al. Carbothermal formation of β'-sialon from kaolinite and halloysite studied by 29Si and 27Al solid state MAS NMR. J. Mater. Sci., 29 (1994) 2611-2619.

DOI: 10.1007/bf00356808

[15] G.S. Neal, M.E. Smith, M.B. Trigg, et al. Solid-state NMR examination of the formation of β-sialon by carbothermal reduction and nitridation of halloysite clay. J. Mater. Chem., 4 (1994) 245-251.

DOI: 10.1039/jm9940400245