Preparation and Hydration Resistance of MgO-MgAl₂O₄ Composite Refractory

Abstract:

Magnesia-magnesium aluminate (MA) spinel composite refractory was prepared by using fused magnesia, industrial alumina and AlCl₃•6H₂O as the raw materials. The effects of calcining temperature and holding time on phase compositions of MgO-MgAl₂O₄ system samples were investigated by X-ray diffraction (XRD) and scanning electron microscope (SEM). With the increase of calcining temperature, the hydration mass increasing rate of the sample decreases significantly. The results show that MgO-MgAl₂O₄ composite refractory has quite excellent hydration resistance because of periclase grains with exsolved spinel phase.

• Periodical: Advanced Materials Research (Volumes 399-401)
• Pages: 851-854
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.399-401.851
• Online since: November 2011
• Authors: Jun Ding, Wen Jie Yuan, Jun Li, Hong Xi Zhu, Cheng Ji Deng
• Keywords: Composite Refractory, Hydration Resistance, MgO-MgAl₂O₄

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