On the evaluation of the activation energy of sintering

Effect of sintering temperature on microstructure and electrical properties of Sr1−x(Na0.5Bi0.5) x Bi2Nb2O9 solid solutions

“…According to the sintering theory [56], the activation energy of sintering should be consistent with that of the diffusion of the rate-limiting species of sintering. In sintering polycrystalline ceramics, it is common that both grain boundary and lattice diffusion of the rate-limiting species can simultaneously contribute to densi cation [57]. In other words, generally the kinetics is limited either by the rate of chemical reaction or by the rate of diffusion phenomenon.…”

Influence of green state processes on the sintering behaviour and the subsequent optical properties of spark plasma sintered alumina

“…Young and Cutler 31 showed that CHR method is extremely sensitive to the green compacts characteristics during initial sintering stage when the porosity is still open, provided that the heating rate is low. 32 From Fig. 5, two different sintering behaviours can be distinguished.…”

Prediction and control of microstructure evolution for sub-microscale α-Al2O3 during low-heating-rate sintering based on the master sintering curve theory

“…However, the activation energy of 1064 kJ/mol obtained in the present work is similar to 1080 kJ/mol in the literature (three heating rates of 3, 5, and 10 • C/min were used to reach the desired temperature of 1700 • C without holding). 12 The value obtained for Q can vary drastically, depending on the conditions (i.e., the characteristics of the raw materials, the preparing procedure of green compacts, the sintering procedure, etc.) under which the sintering data are obtained.…”