The Effect of Wet Ball Milling on Physico-mineralogical and Sintering Properties of Porcelain Raw Materials
AbstractThe efftct of wet ball milling on the porcelain raw material of Panchmane area of Nepal is studied by using X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and differential thermal analysis (DTA) techniques. The wet ball milling on the sample greatly enhances the mullite formation. The mullite is observed at 1100°C for the sample milled for 8 h which is 100°C lower mullite formation temperature than that of the bulk (unmated) sample. The vitrification temperature is around 1300°C and high bulk density maintains in the temperature range from 1200° to 1350°C, which increases further by milling the porcelain raw materials. A certain time of the wet ball milling of the clay sample is necessary for the production of best quality pomelains in Nepal. The micmstructlrre of the sintered bodies fired at appropriate temperatures showed only small pores distributed homogeneously in the sintered bodies of the 8 h milled specimens.
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