Sintering process provides a predominantly solid structure via mass transport reactions. In such an irreversible process, surface energy is consumed through particle bonding to lower the system's energy . The sinterability directly decreases with broader particle size distribution (PSD) , as well as presence of agglomerates . Thermodynamically, decrease in the average particle size results in increase in the specific surface area of a powder as well as increase in interfacial free energy density, 𝛾 (𝐽. 𝑚 5! ), higher reactivity of smaller particles, and consequently enhanced sinterability and densification behavior by decrease in porosity. It is noteworthy that the particles with narrower distribution exhibit a lower sintering rate prior to the occurrence of the grain growth but higher densification rate after the grain growth took place . The kinetics of ceramics sintering is depended significantly on the PSD in a way that using smaller particles along with narrower distribution greatly enhance the kinetics of the sintering reactions rate due to the increase in driving force of sintering process, and thermodynamically enhance tendency of the system to lower the chemical potential of the constituents and the Gibb's free energy of the system.