以焦宝石、活性炭和铝粉为原料并添加Fe2O3后制备了Al4SiC4/Al4O4C复合耐火材料。利用化学分析、X射线衍射和扫描电镜研究了Fe2O3对所制备复合材料的物相组成和显微结构的影响。结果表明:在烧结过程中,从1400℃开始,Fe2O3转变为低熔点物相Fe3Si,产生液相促进Al4SiC4成核、细化晶粒,同时包裹Al4SiC4。此外,未添加Fe2O3的样品中生成的Al4O4C短纤维,Fe2O3的加入使得Al4O4C相变为细小的晶粒。 Al4SiC4 / Al4O4C composite refractory was prepared by using coke, activated carbon and aluminum powder as raw materials and adding Fe2O3. The effects of Fe2O3 on the phase composition and microstructure of the prepared composites were investigated by means of chemical analysis, X-ray diffraction and scanning electron microscopy. The results show that during the sintering process, starting from 1400 ℃, Fe2O3 is transformed into Fe3Si phase with low melting point. The liquid phase promotes Al4SiC4 nucleation and grain refinement, and the Al4SiC4 inclusions. In addition, the Al4O4C staple fiber formed in the sample without addition of Fe2O3 and the addition of Fe2O3 made the Al4O4C phase transformed into fine crystal grains.