Figure 11. (a) Expected sintering curves for NaCl based on LPS (assuming values for each variable of Eq. (12) as reported in the main-text). The curves form part of the reductio ad absurdum argument presented in the main-text, assuming a priori the existence of a grain boundary liquid film. Note that the obtained curves in panel (a) are not consistent with the experimental data for UCSed NaCl.(b) Intergranular liquid film thickness variation as a function of the film thickness (d) during diffusion-controlled LPS (qualitative plot)