采用固相反应法制备了12SrO·7Al2O3钙铝石材料,采取浆液浸渍法制备了12SrO·7A12O3作为涂层的堇青石蜂窝陶瓷型Cu - Mn - Ce -O整体催化剂,以甲基丙烯酸甲酯的催化燃烧作为探针反应考察了该整体催化剂的性能,并对其进行X射线衍射(XRD)、电子扫描电镜(SEM)、能谱(EDS)表征和比表面积(BET)测试.结果表明,以12SrO·7A2O3作为涂层的整体催化剂与无涂层的Cu - Mn - Ce -O整体催化剂相比,其耐高温性能有了明显提高,SEM和EDS表明有涂层的整体催化剂活性组分较之无涂层整体催化剂更为稳定、在表面原子总数中所占比重更高.12SrO·7Al2O3涂层材料的存在不仅保持其活性组分结构,也使得其更多的保持比表面.整体催化剂高温焙烧后比表面积得以保持,成为降低催化剂高温失活程度的原因之一.
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