ALUMINUM TITANATE BASED CERAMIC HONEYCOMB STRUCTURE, PROCESS FOR PRODUCTION OF THE SAME AND RAW MATERIAL POWDER FOR THE PRODUCTION THEREOF

摘要

An aluminum titanate based ceramic honeycomb structure provided with many flow paths separated by porous partition walls, characterized in that the partition walls comprise at least both an aluminum titanate main crystal phase containing solid-soluted MgO and SiO2 and a glass phase, that the glass phase comprises 40 to 80mass% of SiO2 and 1 to 20mass% of MgO, that the mean size of the glass phase in the section of the partition walls is 30µm or below, and that the area fraction of the glass phase in the section of the partition walls is 2 to 12% based on the total area of the aluminum titanate main crystal phase and the glass phase; and a process for the production of the honeycomb structure.