Influence of the Amount of ZrO₂ Additive on the Creep of a Basic Refractory

The dependence of the resistance of basic refractories to high-temperature plastic deformation under load on the amount of zirconium dioxide modifying additive is reported. Creep curves are presented and analyzed. ZrO₂ nanoparticles (average particle size 100 nm) were added to the composition in the range 0.25 – 0.75 wt %. The resistance to high-temperature plastic deformation was significantly improved and was due to the interaction of the ZrO₂ additive with CaO contained in the synthetic periclase obtained by precipitation. Increasing the amount of ZrO₂ additive above 0.5 wt % was found not to have a significant effect.