Effect of Y2O3 and CeO2 on the crystallisation behaviour and mechanical properties of glass–ceramics in the system MgO/Al2O3/SiO2/ZrO2

摘要: The effect of the addition small amounts Y2O3 or CeO2 to a parent glass composition 21.2 MgO·21.2 Al2O3·51.9 SiO2·5.7 ZrO2 (mol%) on course crystallisation and mechanical properties respective glass–ceramics is examined. Depending applied heat-treatment procedure, with Young’s moduli bending strengths that are significantly better than those can be achieved. Using X-ray diffraction scanning transmission electron microscopy including energy-dispersive spectrometry, characterised in terms temperature-induced microstructural changes crystal phase evolvement. It shown 0.5 mol% leads less advantageous additive-free material. Adding glass, however, does not affect strong improvement upon crystallisation. Glass–ceramics up 122 GPa 350 GPa achieved this way. has advantage adjusting colour certain extent, making it promising candidate for artificial tooth replacement materials.