In this paper, ash of Yungui coal was selected for its low deformation temperature (DT is about 1120℃). Two samples of 0.6g the ash of Yungui coal were put on the corundum based refractories first, then they were laid in a muffle furnace for sintering experiments, which were made at 1250℃ for 5 hours under air atmosphere and weak reduction atmospheres respectively. After the experiments, the samples were cooled down naturally to room temperature, then a scanning electron microscopy (SEM) with energy dispersive spectrometer (EDS) was carried o...
