Conductivity and structure features of Ce1−xGdxO2−δ solid electrolytes fabricated by compaction and sintering of weakly agglomerated nanopowders

Sintering of gadolinia-doped ceria prepared by mechanochemical synthesis

“…The activation energy of ionic conductivity was of average magnitude E a = 0.9 eV, increasing slightly with increasing sample porosity. The increase of ionic conductivity of GDC 14 Similarly to our results, these authors also mentioned a slight increase in E a with density diminishing. From our results (see Fig.…”

Advanced Sintering Techniques in Design of Planar IT SOFC and Supported Oxygen Separation Membranes

“…By using weakly agglomerated GDC nanopowders (average grain size 10 nm), the density of 94% from the theoretical value was achieved after sintering at 1100˚C for several hours, and after 108 hours the relative density increased up to 99%. Increasing sintering temperature to 1200-1300˚C allows to obtain 97-99 % density samples after 5 hours dwelling (Ivanov et al, 2007). Sintering of composites of ceria with strontium-doped lanthanum manganites was also studied using conventional techniques.…”

Effect of preparation method on the properties of nanostructured gadolinia-doped ceria materials for IT-SOFCs

“…However, one of the main drawbacks of ceria-based materials is that high temperatures are required to sinter the materials to form dense bodies. To address this problem, different routes for the preparation of ultra-fine powders by both physical and chemical methods have been proposed [5,6]. Such ultra-fine powders are expected to aid sintering and help to bring down the sintering temperature.…”