It should be noted that a similar t

It should be noted that a similar tendency, qualitatively, is observed between the crystallite size and the relative density values of sintered samples (Figure 1 and Figure S2), suggesting that the increasing effect of the crystallite size could correlate with the grain coarsening process during the densification process. While it is also possible a decrease in the grain size produced by the mass transport and dissolution/precipitation processes during the CSP [23]. Besides, larger crystallite sizes for ZnO ceramics processed by CN route than for CSP are identified, which can be attributed to an increased large activation energy for the grain growth during the solid‐state sintering [12]. Therefore, both sintering processes and starting parameters influence the crystallite size of ZnO ceramics.