studied for shrinkage of the green compact by diffusion mechanisms thorough grain boundary and lattice pathways . Therefore, prior to sintering, to achieve a homogenous sintering process with a narrower PSD and eliminate the agglomerates, the as-received powder was wet ball-milled. Figure shows the particle size analysis (PSA) of the as-received and ball-milled 6Sc1CeSZ powders, using polarization intensity differential scattering technique (PIDS). The particle size distribution of both as-sintered and milled powder shows a bimodal gaussian distribution which the mean, median and mode of each individual powder is represented in figure (a). The PSD of the as-received powder consist of 4 peaks with the maximums located at 0.3 µ𝑚, 10 µ𝑚, 29 µ𝑚 and 55 µ𝑚, with more than 50% of the particles have a diameter less than 9.7 µ𝑚.