Effect of TiO2 on Melting and Crystallization Mechanism of Fused Magnesia

Xiang Xie; Guimin Lu; Wei Du; Yinxiong Wang; Jianguo Yu

doi:10.14233/ajchem.2015.17960

Issue

Vol. 27 No. 5 (2015): Vol 27 Issue 5

Issue Published : February 20, 2015

This work is licensed under a Creative Commons Attribution 4.0 International License.

Effect of TiO2 on Melting and Crystallization Mechanism of Fused Magnesia

https://doi.org/10.14233/ajchem.2015.17960

Xiang Xie

National Engineering Research Center for Integrated Utilization of Salt Lake Resource, East China University of Science and Technology, Shanghai 200237, P.R. China

Guimin Lu

National Engineering Research Center for Integrated Utilization of Salt Lake Resource, East China University of Science and Technology, Shanghai 200237, P.R. China

Wei Du

National Engineering Research Center for Integrated Utilization of Salt Lake Resource, East China University of Science and Technology, Shanghai 200237, P.R. China

Yinxiong Wang

National Engineering Research Center for Integrated Utilization of Salt Lake Resource, East China University of Science and Technology, Shanghai 200237, P.R. China

Jianguo Yu

National Engineering Research Center for Integrated Utilization of Salt Lake Resource, East China University of Science and Technology, Shanghai 200237, P.R. China

Corresponding Author(s) : Guimin Lu

gmlu@ecust.edu.cn

Asian Journal of Chemistry, Vol. 27 No. 5 (2015): Vol 27 Issue 5
Article Published : February 20, 2015

Abstract

Fused magnesia was prepared by electric arc furnace melting method using high purity brine magnesia as raw material. The melting and crystallization mechanism of fused magnesia containing 0.15, 0.25 and 0.35 wt % TiO₂ have been investigated. The bulk density, impurity content, crystal type and microstructure of product samples were characterized by Archimedes Method, ICP-AES, XRD, SEM, respectively. Results indicated that fused magnesia with purity of 99.472 wt %, bulk density of 3.569 g/cm³ and apparent porosity of 0.595 % could be obtained with addition of TiO₂ less than 0.25 wt %. It can promote impurities diffusion, MgO crystallization and structural densification. However, excess TiO₂ (> 0.35 wt %) over the solid solubility limit reacted with MgO to form magnesium titanate (Mg₂TiO₄), meanwhile the magnesia crystal was irregular and microstructure changed.

Keywords

TiO2 Fused magnesia Melting and crystallization Solubility limit

Xie, X., Lu, G., Du, W., Wang, Y., & Yu, J. (2015). Effect of TiO2 on Melting and Crystallization Mechanism of Fused Magnesia. Asian Journal of Chemistry, 27(5), 1823–1827. https://doi.org/10.14233/ajchem.2015.17960

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References

M. Chaudhuri, G. Banerjee, A. Kumar and S.L. Sarkar, J. Mater. Sci., 34, 5821 (1999); doi:10.1023/A:1004718503991.

Y. Yu, Y.Z. Ruan and R.P. Wu, J. Chin. Ceram. Soc., 35, 385 (2007).

Y.B. Lee, H.C. Park, K.D. Oh and Y.B. Lee, J. Mater. Sci., 33, 4321 (1998); doi:10.1023/A:1004443728590.

R. Sarkar, S.K. Das and G. Banerjee, J. Ceram. Int., 29, 55 (2003); doi:10.1016/S0272-8842(02)00089-5.

Q.-Z. Huang, G.-M. Lu, Z. Sun, X.-F. Song and J.-G. Yu, J. Metall. Mater. Trans. B, 44, 344 (2013); doi:10.1007/s11663-012-9785-5.

B. Han, Y. Li, C. Guo, N. Li and F. Chen, J. Ceram. Int., 33, 1563 (2007); doi:10.1016/j.ceramint.2006.07.014.

V. Martinac, M. Labor and N. Petric, J. Mater. Chem. Phys., 46, 23 (1996); doi:10.1016/0254-0584(96)80125-8.

N. Petric, V. Martinac, M. Labor and M. Mirošević-Anzulović, J. Mater. Chem. Phys., 53, 83 (1998); doi:10.1016/S0254-0584(97)02064-6.

R. Dongsheng, L. Binyin and Z. Boquan, J. Chin. Ceram. Soc., 17, 75 (1989).

C. Aksel, F. Kasap and A. Sesver, J. Ceram. Int., 31, 121 (2005); doi:10.1016/j.ceramint.2004.03.046.

C. Shujiang, L. Tian and L. Guohua, Magnesium-Calcium Refractory Material, Press of Metallurgical Industry, Beijing, Vol.1, Chap 2, p. 23 (2012) (in Chinese).

R. Sarkar and G. Bannerjee, J. Eur. Ceram. Soc., 20, 2133 (2000); doi:10.1016/S0955-2219(00)00097-2.

Z.X. Gao, N.S. Zhou, T.Q. Wang and L.F. Liang, J. Chin. Ceram. Soc., 33, 1145 (2005).

C. Bingli and J. Xuemin, J. Refrac. Mater., 43, 346 (2009).

P. Bardhan and R.N. McNally, J. Mater. Sci., 15, 2409 (1980); doi:10.1007/BF00550743.

Issue

Vol. 27 No. 5 (2015): Vol 27 Issue 5

Effect of TiO2 on Melting and Crystallization Mechanism of Fused Magnesia

Corresponding Author(s) : Guimin Lu

Abstract

Keywords

Full Article

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