PROCESS FOR PRODUCING ALUMINUM TITANATE-BASED FIRED BODY

摘要

The invention is to provide a process for producing a fired body comprising an aluminum titanate-based ceramic of which the shrinkage ratio in firing (firing shrinkage ratio) can be suppressed low and which is excellent in thermal decomposition resistance. The invention is a process for producing an aluminum titanate-based fired body comprising a step of firing a shaped body of a starting material mixture containing an aluminum source powder, a titanium source powder and a magnesium source powder, wherein the titanium source powder has a specific particle diameter distribution characteristic. In the starting material mixture, the ratio of the Al2O3-equivalent molar amount of the aluminum source powder to the TiO2-equivalent molar ratio of the titanium source powder is preferably within a range of from 35:65 to 45:55, and the ratio of the MgO-equivalent molar amount of the magnesium source powder to the total of the Al2O3-equivalent molar amount of the aluminum source powder and the TiO2-equivalent molar ratio of the titanium source powder is preferably within a range of from 0.03 to 0.15.