Structural Optimization of Cordierite Ceramics Prepared via Cold Isostatic Pressing of Polymer and TiO2

Cordierite ceramics are ceramics obtained from a combination of aluminum, magnesium, and silicon oxides. Given that cordierite ceramics have properties such as very low thermal expansion coefficient, low dielectric constant, low density, high hardness, low loss ratio, refractoriness, and good chemical and mechanical stability, they can be used for high temperature applications and tool making. In this study, solid-state synthesis method using oxide powders and silicone resin, followed by cold isostatic press (CIP) method was applied to produce cordierite ceramic with uniform density. Phase detection by X-ray diffraction and determination of density, microhardness, flexural strength, and dielectric constant was performed. The results showed that the α-cordierite phase was synthesized with a density of 2.5 gr/cm-3, hardness of 1151.6 HV, flexural strength of 131.4 ± 6 MPa, dielectric constant of 3.15, andloss tangent of 0.0048 in the frequency range of 8-12.5 GHz.