Thermomechanical behavior of a zircon–mullite composite

Fully densified zircon co-doped with iron and aluminium prepared by sol–gel processing

“…The effect of this liquid phase sintering is to eliminate internal pores more effectively, increasing the bulk density of the final ceramic. In the literature it has been reported that during heating of zircon-mullite composites, zircon will be in equilibrium with a glassy phase 36 ; alumina present in the mixture will be dissolved in this glassy phase and will precipitate out as mullite during cooling, although no mullite was detected by XRD in these samples due to the small amounts of Al present. This would suggest that there is a possibility of producing a densified ceramic with a crystalline grain boundary phase which does not degrade at high temperatures.…”

Dissolution, bioactivity behavior, and cytotoxicity of 19.58Li2O·11.10ZrO2·69.32SiO2 glass–ceramic

“…The magnitudes of the hardness and elasticity modulus values are of practical interest, with microhardness and elasticity modulus reaching approximately 6 and 115 GPa, respectively. These promising results can be associated with low porosity and zirconium silicate crystals that have a hardness between 9 and 10 GPa 20 and an elastic modulus of 244 GPa 38 …”

“…These promising results can be associated with low porosity and zirconium silicate crystals that have a hardness between 9 and 10 GPa 20 and an elastic modulus of 244 GPa. 38 The flexural strength of the heat-treated glass-ceramic at 800 C for 60 min was 135 MPa. On the other hand, a higher flexural strength (190 MPa) was obtained for the heat-treated glass-ceramic at 900 C for 60 min.…”

Microstructure and reaction mechanism of SiC ceramic with mullite-zircon as a new liquid-phase sintering additives system

“…These properties make zircon a potential candidate as a useful structural ceramic, especially in such fields where a sudden change of temperature may occur [8,9]. Zircon-mullite material obtained by reaction sintering has been widely studied and used both in traditional and advanced ceramics due to their excellent properties such as high melting point, high strength and fracture toughness, as well as good wear and thermal shock resistance [10][11][12]. Although zircon and mullite are different from the chemical and crystallographic point of view, their mechanical properties are similar [13].…”