Abstract
In the present article, Iranian clay and alumina was used as the starting materials to synthesis mullite phase by microwave heating process. Phase investigations and physical characteristics of sintered samples at different heating temperatures and times, and forming forces were determined. XRD results showed that mullitization was completed after heating for 20 minutes. Density, porosity and shrinkage of sintered samples were measured to be 2.23 g/cm3, 29.7% and 5.5%, respectively. The increase of forming force from 1 to 4 ton increased the density of sintered samples to 2.31 g/cm3 and decreased porosity and shrinkage to 26.1% and 4.3%, respectively. By increasing the forming force, the microstructure of sintered samples became more homogeneous.
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