Abstract: The paper studies the effect of adding rare earth yttrium oxide on the properties of
Al2O3-SiC-C bricks. The results show that the addition of rare earth yttrium oxide can promote
the sintering of Al2O3-SiC-C brick samples，and the bulk density, apparent porosity，and
cold compressive strength of the samples are significantly improved. Under high temperature
conditions，rare earth yttrium oxide can make the sample,s structure denser，resulting in a
significant improvement in the bending resistance at high temperature. After adding yttrium oxide，
the thermal shock resistance and slag resistance of the samples are also significantly improved.

Key words: Al2O3-SiC-C brick, Rare earth yttrium oxide, Sintering, Thermal shock performance