Abstract
CaO ceramics was sintered from reagent-grade CaCO3 powder at 1500°C by the addition of 0-20% (molar ratio). The densification of the compact was promoted due to the effect of MgO on inhibiting the growth of CaO grain. With increasing addition of MgO, the microstructure of the clinker underwent a restructuration process. Homogeneous microstructure, with well growing MgO grains occupying most of the boundary triple points of CaO grain, formed by the addition of 20% MgO. The slaking resistance of the clinker was significantly improved due to the formation of CaO solid solution, promotion of densification and modification of microstructure by the addition of MgO.
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