METHOD FOR PRODUCING ALUMINUM TITANATE CERAMIC SINTERED BODY, AND ALUMINUM TITANATE CERAMIC SINTERE

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The invention is to provide a process for producing an aluminum titanate-based ceramics capable of realizing low thermal expansion and high mechanical strength and having little dimensional change in firing, at a low firing temperature of lower than 1500°C. The invention is a process for producing an aluminum titanate-based ceramics fired body comprising a step of shaping a ceramic plastic rammed earth containing a precursor mixture and an organic-based binder into a predetermined shape, wherein the starting material mixture containing a titanium source powder, an aluminum source powder and a silicon source powder, and a step of maintaining the shaped ceramics plastic rammed earth within a temperature range of from 900 to 1350°C at a temperature change per hour of from -50 to +50°C/hr for 3 hours or more, followed by heating up to a temperature of 1400°C or higher and firing at the temperature. And the invention is an aluminum titanate-based ceramics fired body that is obtained by the said invention and having a porosity of from 30 to 60%.