应用改进的涂覆方法--真空抽提法,在堇青石蜂窝陶瓷基体表面涂覆氧化铝涂层.在研究铝溶胶的稳定性和粒径分布的基础上,通过牢固度测试、比表面测定、XRD和SEM等手段对涂层的涂覆效果进行了分析,结果表明相对普通浸渍法,采用真空抽提法得到的氧化铝涂层的涂覆率更高、涂布更均匀、比表面积更大、牢固度更强.而且由真空抽提法得到的基底材料制备的整体式催化荆,在甲苯催化燃烧反应中表现出更为优越的催化活性,甲笨催化燃烧起燃温度T10为180℃,近似完全转化温度T99为215℃.
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