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中文摘要：
为开发性能优良的热风管道用浇注料，以30％（w）的5—3mm和25％（W）的3—1mm的w（Al2O3）≥80％的矾土均质料和≤1mm的15％（w）的红柱石颗粒为骨料，以8％（w）的红柱石细粉、4％（w）的Al2O3微粉、18％（w）的电熔刚玉细粉、SiO2微粉和纯铝酸钙水泥为基质，研究了SiO2微粉加入量（质量分数分别为2％、4％、6％）和纯铝酸钙水泥加入量（质量分数分别为2％、3％、4％、6％）对矾土-红柱石基浇注料常温性能、高温抗折强度和抗热震性的影响，并采用XRD和SEM分析试样的物相组成和显微结构。结果表明：1）随SiO2微粉加入量的增加，试样的常温性能明显改善，1300℃的高温抗折强度先增大后减小，1400℃的高温抗折强度逐渐增大，但抗热震性变差。2）随纯铝酸钙水泥加入量的增加，试样1300℃的高温抗折强度逐渐增加，1400℃的高温抗折强度逐渐减小，抗热震性变化不大。3）水泥和SiO，微粉加入量的变化对材料高温性能的影响，主要与SiO2微粉和Al2O3反应、红柱石的莫来石化反应生成莫来石的含量和形貌，以及体系内玻璃相的含量和分布有关。4）综合考虑，矾土-红柱石基浇注料中水泥加入量不宜超过3％（w），SiO2微粉加入量不易超过4％（w）。
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