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In this study, to improve the comprehensive performance of lightweight Al2O3‐MgAl2O4 refractories with gradient density, CaCO3 was added in the matrix to develop platelet structures by adding different amounts (1, 2, 3, and 4 wt%). The effect of CaCO3 addition on the phase composition, microstructure, and properties of lightweight refractories was investigated. The results showed that CaO·6Al2O3 and...
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