Abstract: To provide a material with excellent comprehensive properties for the glass kiln melting pool,zirconia powder and alumina powder were fully mixed according to the ratio of m(ZrO2)∶ m(Al₂O₃)=4∶1 and fused in an arc furnace.The obtained fused zirconia-corundum eutectic material was processed into different particle sizes,batched according to a certain particle size distribution and mixed evenly.After pressure molding and sintering at 1 750 ℃,new zirconia-based composites were prepared.The phase composition and microstructure of the composites were analyzed.The molten glass corrosion resistance of the composites was compared with that of zirconia corundum bricks 33^# and 41^#.The results show that the new zirconia-based composites have a dense structure,high chemical purity without low melting point components,and good thermal shock resistance.Compared with zirconia corundum bricks 33^# and 41^#,after corroded by high temperature molten glass,the new composites have no corrosion cavities,no needle-like pores or defects or liquid phase infiltration and no reaction with molten glass,showing good corrosion resistance to molten glass.

Key words: glass kiln, zirconia-based composites, thermal shock resistance, corrosion resistance

摘要： 为了给玻璃窑熔池提供一种综合性能优良的材料,按m(ZrO₂)∶ m(Al₂O₃)=4∶1将ZrO₂粉和Al₂O₃粉充分混合后在电弧炉内熔融,再将得到的电熔氧化锆-刚玉共晶料加工成不同粒度,随后按一定的颗粒级配配料并混合均匀,压制成型后在1 750 ℃下烧结,制备了新型氧化锆基复合材料,分析了物相组成和显微结构等性能,并与33^#锆刚玉砖和41^#锆刚玉砖进行了抗玻璃液侵蚀性对比。结果表明:新型氧化锆基复合材料结构致密,且化学纯度高、组分无低熔点物,具有良好的抗热震性。与33^#锆刚玉砖和41^#锆刚玉砖相比,新型氧化锆基复合材料被高温玻璃液侵蚀后未见孔洞,无针状气孔及缺陷,无液相渗入,与玻璃液没有发生反应,具有良好的抗玻璃液侵蚀性能。

关键词: 玻璃窑炉, 氧化锆基复合材料, 抗热震性能, 抗侵蚀性能