Two-step sintering of nanocrystalline 8Y2O3 stabilized ZrO2 synthesized by glycine nitrate process

Two-Step Sintering of Ceramics

“…Hence, TSS on 8YSZ controls the grain growth compared to 3Y-TZP due to its cubic crystal structure. TSS has been widely applied to 8YSZ to improve mechanical, electrical as well as the gas permeance via controlling the grain growth [3,9,24,[32][33][34] ) [9]. In addition to the above property, it is necessary to control grain growth to achieve optimum ratio of grain size to electrolyte layer thickness (0.1 < z < 0.3) to control gas permeance value for SOFC [64].…”

Densification and grain growth behavior of highly dense MgO ceramics in pressureless sintering

“…4a, we can see that at 1400 1C the main migration mechanism is grain boundary diffusion because q 4 3, and that volume diffusion has taken effect at 1410 1C but grain boundary diffusion still plays a main role for q ¼ 2.82 7 0.03 close to 3. Since grain boundary diffusion has little effect on grain growth [6,7,14] and volume diffusion is connected with grain growth [9], the grain growth rate plot (Fig. 3) below 1410 1C is very placid.…”

“…Fortunately, Chen et al [5] reported a novel method called twostep sintering (TSS), during which the grain boundary migration is suppressed while the grain boundary diffusion remains active, making it possible to reach a high final density with suppressed grain growth. So far, a TSS method has been used successfully in many materials [6][7][8]. However, no success has been reported on the two step pressureless sintering of MgO ceramics without sintering additives.…”

Dependence of dielectric properties on microstructural characteristics of (Ba0.7Sr0.25Ca0.05)(Ti0.9Zr0.1)O3 ceramics

“…High densities and homogeneous microstructures with small grain size have been obtained for BaTiO 3 [12], Y 2 O 3 , [13,14] cZrO 2 , [15,16], and ZnO [17] ceramics sintered by the two-step method that consists of the individual stages grain growth and densification.…”