A series of low-creep magnesium aluminate spinel refractories doped with 0–3 wt% Y₂O₃ were prepared by sintering at 1750 °C. The physical properties, especially the high-temperature properties of the refractories, were investigated. X-ray diffractometry (XRD) and scanning electron microscopy (SEM) were applied to characterize the phases and microstructure of the refractories. The results indicated that yttrium aluminum garnet (YAG) could be in situ formed with the addition of Y₂O₃ in the spinel refractories. This stabilized the grain boundary of the spinel. The mechanical properties and high-temperature creep resistance of the spinel refractory could significantly be improved by the addition of Y₂O₃.

中文翻译：

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Y 2 O 3掺杂对铝酸镁尖晶石耐火材料高温性能的影响

通过在1750°C的温度下烧结，制备了一系列掺有0–3 wt％Y ₂ O ₃的低蠕变铝酸镁尖晶石耐火材料。研究了耐火材料的物理性能，尤其是高温性能。用X射线衍射仪（XRD）和扫描电子显微镜（SEM）表征了耐火材料的相和微观结构。结果表明，在尖晶石耐火材料中添加Y ₂ O ₃可原位形成钇铝石榴石（YAG）。这稳定了尖晶石的晶界。添加Y ₂ O可以显着改善尖晶石耐火材料的力学性能和高温抗蠕变性₃。