利用XRD研究了采用不同稳定剂制备的钛酸铝陶瓷在 85 0℃还原气氛下 (铝熔体中 )的热分解率。发现采用复合稳定剂Y2 O3 +MgO制备的钛酸铝陶瓷材料在铝熔体中 85 0℃ /5 0 0h的热分解率仅为 4.3 % ,具有良好的热稳定性。利用该材料所制备的低压铸造陶瓷升液管 ,在 70 0～ 90 0℃的热稳定性优良 ,可稳定运行 60d不破坏 The thermal decomposition rates of aluminum titanate ceramics prepared with different stabilizers under 85 0 ℃ reduction atmosphere (aluminum melt) were studied by XRD. It is found that the thermal decomposition rate of aluminum titanate ceramic material prepared with Y2 O3 + MgO as composite stabilizer is only 4.3% at 85 0 ℃ / 500h in aluminum melt, which shows good thermal stability. The low-pressure casting ceramic liquid rising pipe prepared by using the material has excellent thermal stability at 70 0 ~ 90 0 DEG C and can be stably operated for 60 days without damaging