利用扫描电镜及能谱仪对国产和进口Cr2O3-90砖的显微结构进行了观测与分析,结果表明两种砖虽组成接近,但结构和工艺存在明显差异,进口砖采用烧结氧化铬为骨料,且基质结构十分均匀致密;国产砖则采用电熔氧化铬为骨料,基质与骨料之间虽烧结紧密,但结构的均匀性和致密性均略逊于进口砖,再加上基质中较高的Al2O3含量以及骨料颗粒中多而长的裂隙,这些都将对国产砖的使用性能与寿命产生一定的不利影响。 The microstructure of domestic and imported Cr2O3-90 bricks was observed and analyzed by means of SEM and EDS. The results showed that although the composition of the two bricks was similar, there were obvious differences in the structure and technology. The imported bricks were sintered with chromic oxide Material, and the matrix structure is very uniform and compact; domestic brick is fused with chromium oxide as aggregate, although the matrix and aggregate sintering between the dense, but the structure uniformity and compactness are slightly inferior to imported bricks, coupled with matrix In the higher Al2O3 content and the aggregate particles in the long and more cracks, which will have a detrimental impact on the performance and life of domestic bricks.