莫来石纤维多孔陶瓷负载性能研究  

STUDY ON SUPPORT PROPERTIES OF THE MULLITE FIBER POROUS CERAMICS

作　　者：王小华[1] 曾令可[1] 罗民华[2] 

机构地区：[1]华南理工大学材料学院,广州510640 [2]景德镇陶瓷学院,33001

出　　处：《陶瓷学报》2005年第1期39-41,共3页Journal of Ceramics

摘　　要：用酸性偏磷酸盐作粘结剂、加压排液法成型制备了孔隙率高达96%的莫来石纤维多孔陶瓷,采用真空浸渍法,对其负载稀土复合金属氧化物La_(0.8)Sr_(0.2)CoO_3的性能进行了研究,考察了浸渍时间、浸渍次数对负载量的影响,得出最佳浸渍时间为60min,浸渍次数为2次。通过扫描电镜(SEM)表征了内部架构,最后指出莫来石纤维多孔陶瓷有望成为具有较好效果的新型催化剂载体。Mullite fiber porous ceramic was prepared with acid aluminum phosphates as binder and pressure liquid-displacement forming, with porosity of 96%. Properties of La0.8Sr0.2CoO3 supported on Mullite fiber porous ceramic were studied with vacuum impregnation. Relations between impregnation times, impregnation numbers, and support weight were observed.The optimal impregnation time was 60 minutes and the optimal impregnation number is 2. Structural frame was charaterazed with SEM photos. In the end, mullite fiber porous ceramics as a good catalyst carrier is possible.

关 键 词：莫来石纤维 多孔陶瓷 LA0.8SR0.2COO3 性能研究 扫描电镜(SEM) 复合金属氧化物 浸渍时间 真空浸渍法 催化剂载体 偏磷酸盐 粘结剂 孔隙率 负载量 成型 

分 类 号：TQ174.758[化学工程—陶瓷工业] TB333[化学工程—硅酸盐工业]