Abstract: Using silicon carbides as the main raw materials， and the phenolic resin， Al2O3 and B2O3 powders as the room temperature and high temperature bonding agents， respectively， the influences of synthetic conditions on the bulk density， flexural strength and thermal shock resistance of the burningfree aluminum boratesilicon carbide refractory materials were studied. The results showed when the mass fraction of phenolic resin was 5%， the bulk density and flexural strengths of the refractory were 266g·cm-3 and 13~21MPa， respectively. After sintering at 960℃， the main phases were SiC， Al2O3， Al4B2O9. When the mass fraction of the hightemperature binders was 75%， the bulk density had the maximum value of 255g·cm-3. When the mass fraction of the hightemperature binding agent was 125%， the flexural strength had the maximum value of 19MPa. After 5 times high temperature thermal shocks， when the mass fraction of the hightemperature bonding agent was 75%， the thermal shock resistance of the refractory was better and the flexural strength loss rate was 25%.

Key words: burningfree, silicon carbide, refractory, performance, thermal shock resistance