The purpose of the current research was to fabricate zirconia-mullite nanocomposites by heat treatment of mechanically activated kaolinite, gibbsite, and zircon powder mixture as an inexpensive and convenient starting material.Scanning electron microscopy results revealed a fine and homogeneous distribution of zirconia particles in the mullite matrix after 72 h of the mechanical activation process. Increasing the duration of milling process from 6 h to 72 h had a remarkable effect in increasing the diametral tensile strength values from 30 to 220 MPa.

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