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利用同晶型间的拓扑转化原理及存在大量平炉尘这一现实,用平炉尘制备了不用高温焙烧的中温变化催化剂和纳米级尖晶石型铁酸盐磁性粉末.“,”Applying theory of topotactice reaction in the same crystal class, we can utilize the rich resources of open-hearth dust to prepare the high temperature shift catalyst without calcining at high temperature and producing the ultra-fine spinel ferrites.