The effects of Sm₂O₃ as an additive on the densification of a pre-synthesized magnesia-rich spinel were investigated. The sintering behavior of the material was characterized by analyzing its dilatometric characteristics, linear shrinkage, bulk density, apparent porosity, phase structure, and microstructure. Moreover, the cold modulus of rupture (CMOR) and microhardness of the spinel were measured. The results show that samarium oxide reacts with the spinel to form SmAlO₃ (a rare-earth aluminate) to improve the sintering performance and mechanical properties of the spinel. The formation of magnesite phases decreases the rupture strength of the spinel. However, this MgO phase is inlaid in spinel grains boundary, has a pinning effect which can improve the sinterability of the spinel.

研究了 Sm ₂ O ₃作为添加剂对预合成富镁尖晶石致密化的影响。通过分析材料的膨胀特性、线收缩率、堆积密度、表观孔隙率、相结构和微观结构来表征材料的烧结行为。此外，还测量了尖晶石的冷断裂模量 (CMOR) 和显微硬度。结果表明，氧化钐与尖晶石反应生成 SmAlO ₃（一种稀土铝酸盐）以提高尖晶石的烧结性能和机械性能。菱镁矿相的形成降低了尖晶石的断裂强度。但是，这种MgO相镶嵌在尖晶石晶界，具有钉扎​​作用，可以提高尖晶石的烧结性。