Effects of Additive Composition and Content on Sintered Density and Compressive Strength of Cordierite Ceramics

Abstract

Cordierite ceramics were fabricated via a reaction sintering process using ceramics-filled polysiloxane as a precursor for cordierite ceramics. In this study, the effects of the additive composition, additive content, and sintering temperature on the sintered density and compressive strength of cordierite ceramics have been investigated. The sintered densities of reaction-sintered cordierite ceramics containing TiO₂ as an additive were insensitive to the additive composition, additive content, and sintering temperature and ranged from 1.92 g/㎤ to 2.06 g/㎤. In contrast, the cordierite ceramics containing Y₂O₃ showed a maximal density of 2.21 g/㎤ at 5 wt% addition and at a sintering temperature of 1400℃. The compressive strength of cordierite ceramics showed the same tendency with the density. Typical compressive strength of cordierite ceramics containing 5 wt% Y₂O₃ as a sintering additive and sintered at 1400℃ was~480 ㎫.