Abstract
The mechano-chemical and microstructural evolution using magnesiumaluminium spinel in a MgO-CaZrO3 sintered refractory matrix acting as ceramic bonding was investigated. The microstructural study reveals MgAl2O4 spinel phase at contact points between MgO and CaZrO3 particles. In addition, the cold crushing strength of the MgO-CaZrO3 matrix increases with the addition of 2.5-3.5 wt% MgAl2O4 spinel, this being attributed to the strong bond formed between MgO and CaZrO3 due to the MgAl2O4 spinel phase aid. Finally, this refractory matrix exhibits a good thermal stability and excellent chemical resistance against cement raw meal.
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