Synthesis, sintering and electrical properties of yttria–calcia-doped ceria

Effect of Fe2O3 on Sm-doped ceria system solid electrolyte for IT-SOFCs

“…To reduce sintering temperatures, ultra-fine ceria-based powders are frequently used in physical and chemical methods, such as sol-gel synthesis, co-precipitation, chemical combustion vapor synthesis, and intensive mechanical milling [17][18][19][20][21]. Alternatively, sintering aids, such as CuO, Al 2 O 3 , MnO 2 , ZnO and CoO [20,[22][23][24][25], can be employed to promote densification.…”

Effects of cobalt metal addition on sintering and ionic conductivity of Sm(Y)-doped ceria solid electrolyte for SOFC

“…Our previous study found that the addition of Y 2 O 3 to Sm 2 O 3 -doped ceria electrolyte (SDC) resulted in improved grain boundary conductivity in association with better densification [5]. One problem with these solid solutions is the need for high sintering temperature, between 1500 and 1600°C to obtain proper apparent densities [6]. The high sintering temperature could also introduce atomic diffusion between electrolyte and electrode inter-layer which led to deteriorated properties of the cells [7].…”

Comparative study of doped ceria thin-film electrolytes prepared by wet powder spraying with powder synthesized via two techniques

“…Reported SDC electrical conductivity has ranged from 10 −4 to 10 −2 S cm −1 at 600 • C in air [43][44][45][46][47][48][49][50][51][52][53][54][55]. Different synthesis techniques can result in different impurity levels and different grain morphologies, leading to different conductivities.…”

“…As compared to YSZ electrolytes, CeO 2 -based electrolytes are more difficult to densify. Many researches are focused on the sinterability of the doped ceria electrolytes at reduced temperatures [47][48][49][50]. In this study, special attention was paid to the effect of different powder synthesis techniques on the densification of SDC electrolytes and the consequent cell performance.…”