Effect of Sintering Temperatures on the Sintering Performance and Thermal Shock Resistance of MgO-Al₂O₃-Fe₂O₃ Composite

Abstract:

The composites in the MgO-Al₂O₃-Fe₂O₃ system were prepared using high pure magnesia and alumina as raw materials and ferric oxide powder as additive. The effect of sintering temperatures on the sintering performance and thermal shock resistance of the composites was studied. The results showed that both the apparent porosity and linear change ratio of the samples decreased with the increase of sintering temperatures, and their bulk density and bending strength increased accordingly. The sample sintered at 1550°C exhibits excellent thermal shock resistance. The XRD and SEM results indicated that the crystal phase of the samples remained the same, but their microstructure became denser as the sintering temperatures increased from 1500°C to 1600°C. As a result, the composites could be sintered at about 1550°C, which has a potential application in cement rotary kiln linings.

• Periodical: Advanced Materials Research (Volumes 194-196)
• Pages: 1755-1758
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.194-196.1755
• Online since: February 2011
• Authors: Jing Long Bu, Yan Qing Cai, Li Xue Yu, Zhi Fa Wang, Rong Lin Wang
• Keywords: Alumina, Composite, Ferric Oxide, Magnesia, Performance

References

[1] L. Yuan, Z.J. Wang, X.F. Chen, et al: China Cement. Vol. 3 (2006), pp.70-73. (In Chinese).

[2] C.X. Lu, D.F. Zheng: China Cement. Vol. 5 (1998), pp.11-15. (In Chinese).

[3] G.H. Jing, G.Q. Xiao: Naihou Cailiao. Vol. 5 (2004), pp.347-349. (In Chinese).

[4] G.P. Yu: Foreign Refractories. Vol. 2 (1995), pp.37-39. (In Chinese).

[5] H.X. Li: China Cement. Vol. 10 (2004), pp.79-82. (In Chinese).

[6] B.J. Liu: Cement Guide for New Epoch. Vol. 4 (2002), pp.43-44. (In Chinese).

[7] X.J. Liu, F.T. Qin: China Building Materials Science & Technology. Vol. 6 (2000), pp.26-28. (In Chinese).

[8] R. Quan: Sciencce and Technolgy of Cement. Vol. 2 (2005), pp.15-16.