Preparation and Property of High Surface Area Alumina Resisting High TemperatureEffect of Barium Addition and Its Synergy with Lanthanum on the Thermal Stability of Alumina
Abstract High surface area alumina resisting high temperature was prepared by sol-gel method or sol-gel assisted impregnation method. The effects of barium addition and its synergy with lanthanum on the thermal stability were studied by XRD and surface analysis techniques. The results showed that when Ba was introduced by sol-gel method, Ba showed a little effect in improving the thermal stability of alumina. While 5. 2%La introduced by sol-gel method and 2. 0%Ba was introduced by impregnation method, becau...