Abstract
The thermo mechanical behavior of magnesia refractory with CaO/SiO2<1 containing 0-12 wt% CaZrO3 clinker was investigated after sintering at 1700°C for 6 hr. Results show that CaZrO3 additions improve sintering behavior of magnesia with formation of monticellite. Samples containing CaZrO3 have a higher strength at room temperature while their hot strength substantially decreases.Thermal shock is improved by the addition of CaZrO3 due to the decrease of the thermal expansion coefficient.
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