The Influences of Zirconia on the Properties of Magnesia Alumina Spinel Bricks

Abstract:

Using alumina-rich MgAl₂O₄ spinel AR78 and 97 fused magnesite as raw materials, brine as the binder, magnesia alumina spinel bricks close to theoretical composition and spinel bricks with zirconia have been prepared. Then the influences of zirconia on the properties of MgAl₂O₄ spinel bricks are researched. The results show that: (1) After the addition of zirconia, the direct bonding structure formed between spinel and zirconia can strengthen matrix structure and promote sintering, so the structural properties, the alkali resistance performance and the creep property of MgAl₂O₄ spinel bricks are all improved. (2) The optimal addition of zirconia is 6%, with which the spinel bricks have well alkali resistance performance and creep property of which the final creep rate is -1.46% after creep experiment for 50h.

• Periodical: Advanced Materials Research (Volumes 690-693)
• Pages: 639-642
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.690-693.639
• Online since: May 2013
• Authors: Shan Shan Hong, Yong Li
• Keywords: Alkali Resistance, Creep Property, Magnesia Alumina Spinel, Oxy-Fuel Glass Melting Furnace, Zirconia

References

[1] Guoping Chen, Minge Feng, Hairong Yin, Mingzhen Yang, Tao Wang. Present status and prospect of china domestic refractory. Materials Review. (In Chinese): 2010, 24 (10): 54-56

[2] Shaoli Wang. The effect of ZrO2 on the property and microstructure of MgO spinel refractory. Refractories & Lime.(In Chinese): 2011, 36(4): 55-58

[3] Songlin Chen, Lin Yuan, Zhongqi Feng, Xuefeng Chen, Luju Zeng, Xijun Liu, Changyou Dai, Jialin Sun. Investigation on hot rupture and thermal shock resistance of magnesia-zirconia brick. Journal of Materials and Metallurgy.(In Chinese): 2011, 10(3): 226-230

[4] Juntao Wang. The research of the zirconia toughened corundum-spinel castables. Beijing: China Building Materials Academy, 2009 (In Chinese)

[5] Songlin Chen, Lin Yuan, Zhongqi Feng, Luju Zeng, Xijun Liu, Xuefeng Chen, Juntao Wang, Jialin Sun. Modulus of rupture and thermal shock resistance of magnesia-zirconia bricks with the microstructure of periclase covered by zirconia. Journal of University of Science and Technology Beijing.(In Chinese): 2011, 33(9): 1141-1145