| abstract |
It is an object to provide a method capable of producing magnesium aluminum titanate having a small coefficient of thermal expansion at a firing temperature of less than 1500 ° C. In the production method of the present invention, the precursor mixture containing the titania source powder, the alumina source powder, the magnesia source powder, and the silica source powder is kept at a temperature range of 1100 ° C to 1350 ° C for at least 3 hours, and then heated to a temperature of 1400 ° C or higher. And baking at the same temperature. The silica source powder is preferably a powder of alkaline feldspar. Magnesium aluminum titanate powder can be manufactured by obtaining magnesium aluminum titanate by the manufacturing method of this invention, and pulverizing the obtained aluminum magnesium titanate. |