Abstract
Abstract Micro-sized MgCO 3 was used in castables as the MgO-precursor for generating sub-micro sized MgO and for producing subsequent in-situ magnesium aluminate (MgAl 2 O 4 , MA) spinel. The influence of 0–2.0 wt% micro-sized MgCO 3 addition on the volumetric stability and thermo-mechanical properties of castables after firing at 1000 °C and 1550 °C was investigated. The in-situ spinel formation and its influence on the microstructure evolution in castable matrices with different micro-sized MgCO 3 contents after heat-treatment were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM), respectively. The dependence of the volume stability and thermo-mechanical properties of castables on the micro-sized MgCO 3 addition was discussed with respect to the in-situ spinel formation.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
