微波法制备ZrO_2/Al_2O_3复合载体及其性能的研究  

Preparation with Microwave Techniques and Performances of ZrO_2/Al_2O_3 Composite Supports

作　　者：李凝[1] 罗来涛[1] 

机构地区：[1]南昌大学化学系

出　　处：《材料导报》2005年第12期127-128,135,共3页Materials Reports

基　　金：高等学校博士学科点专项科研基金(20040403001);江西省教育厅科学研究资助项目

摘　　要：采用真空浸渍和微波技术在经过扩孔处理的 Al_2O_3载体上制备 ZrO_2/Al_2O_3复合载体。经 XRD、DSC-TG、TPD 等测试表明:ZrO_2能单层分散在 Al_2O_3表面,分散阈值为0.242gZrO_2/gAl_2O_3;在微波条件下,ZrO_2的单层分散没有明显改变 Al_2O_3的孔径分布,复合载体具有较好的热稳定性,ZrO_2单层分散的复合载体表面具有酸、碱性质,碱性中心数大于非单层分散的复合载体,同时单层分散的复合载体具有较大的比表面积和适宜的孔径分布。初步证明,Al_2O_3能诱导单层分散 ZrO_2产生新的碱性中心。The microwave heating is applied to the preparation of ZrOz supported Al2O3. The obtained ZrO2/Al2O3 materials are characterized by XRD,DSC-TG and TPD et al investigations,ZrO2 is dispersed as monolayer on the surface of Al2O3 support with the dispersion threshold 0. 242g ZrO2/gAl2O3. Under the microwave, monolayer dispersion of ZrO2 on the surface of Al2O3 shows the composite supports exists not only independently located acid and base sites, responsible for the adsorption of NH3 and CO2, but the base amount is larger than acid amount. The composite supports have better thermal stability and proper pore distribution.

关 键 词：微波技术 复合载体 分散阈值 

分 类 号：TQ174.758[化学工程—陶瓷工业] O643.36[化学工程—硅酸盐工业]