湿化学法制备锆铝质耐火材料的抗热震性研究

Study on thermal shock resistance of zirconia-alumina refractory prepared by wet-chemical process

采用湿化学方法制备了不同团聚度的氧化锆粉体 ,并将其复合到氧化铝基体中 ,旨在引入弥散氧化锆所伴随产生的微裂纹来代替传统刚玉耐火材料中的结构微气孔 ,以提高材料的抗热震性能。研究表明 ,以水清洗工艺所获材料的抗热震性能明显优于酒精清洗工艺 ,其原因在于前者对团聚氧化锆形成有利。同时 ,还对该类复合材料的抗热震机理、热震性能表征作了深入分析。

Agglomerate m ZrO_2 was synthesized by wet chemical process and was dispersed in alumina matrix to improve thermal shock resistance,resulting from inter microcrack produced by agglomerate zirconia, instead of structural pore introduced in conventional alumina. The results have indicated the excellent thermal shock resistance of the materials after water wash process was obtained in comparison with that after ethanol wash process. The reason is attributed to the effect of agglomerate. In addition, The mechanism and property of thermal shock resistance were deeply studied.