Effect of TiO₂ on Mechanical Properties and Microstructure of Magnesium Aluminate Spinel Refractories

Abstract:

MgO-Al₂O₃-TiO2 composite refractories were prepared by using magnesium aluminate spinel (MgAl₂O₄) and titanium dioxide as main starting materials and being sintered at high temperature. The influences of titanium dioxide additions on the room temperature physical properties, phase composition and microstructure were investigated. The phase composition and microstructure were tested by means of XRD and SEM. The results revealed that with increasing TiO₂ content, the densification of the composites first increased sand then decreased and maximized at 4% TiO₂ loading. This showed appropriate amount of TiO₂ could contribute to the sintering of the composites due to the solid solution of TiO₂ in magnesium aluminate spinel.

• Periodical: Advanced Materials Research (Volumes 284-286)
• Pages: 638-641
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.284-286.638
• Online since: July 2011
• Authors: Jun Cong Wei, Xiao Cui Han, Chun Hui Gao, Jian Kun Huang, Jun Bo Tu
• Keywords: Magnesium-Aluminate Spinel, Mechanical Property, Sintering Temperature, TiO₂

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