Abstract Magnesium aluminate spinel is widely used in cement rotary kilns, in the iron and steel industries, as well as in glass melting furnaces due to its excellent performance and chemical stability at both room temperature and elevated temperatures. In spite of these advantages, there are some practical problems during production of magnesium aluminate spinel refractories due to their poor sinterability: poor mechanical properties and poor creep resistance. These issues can cause problems during service. This study improved the sinterability of spinel refractories and in turn improved mechanical properties while decreasing the creep rate. This was done by forming a second low creep rate phase of yttrium aluminum garnet in the matrix structure. The addition of Y2O3 and reactive Al2O3 accelerated the densification process and increased the cold strength. There was a significant increase in the hot modulus of rupture due to the formation of YAG or the solid solution with spinel.

中文翻译：

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Y 3 Al 5 O 12 原位生成对铝酸镁尖晶石耐火材料性能改进的影响

摘要 铝酸镁尖晶石由于其优异的性能和在室温和高温下的化学稳定性，被广泛用于水泥回转窑、钢铁工业以及玻璃熔炉。尽管有这些优点，但由于铝酸镁尖晶石耐火材料的烧结性差，在生产过程中存在一些实际问题：机械性能差和抗蠕变性差。这些问题可能会导致服务期间出现问题。该研究提高了尖晶石耐火材料的烧结性，进而提高了机械性能，同时降低了蠕变速率。这是通过在基体结构中形成钇铝石榴石的第二低蠕变速率相来实现的。Y2O3 和活性 Al2O3 的加入加速了致密化过程并提高了冷强度。由于YAG的形成或与尖晶石的固溶体的形成，热断裂模量显着增加。