Effect of sintering temperature on the microstructure and ionic conductivity of Ce0.8Sm0.1Ba0.1O2-δ electrolyte

Abstract

This study investigated the effects of sintering temperature on the microstructure and ionic conductivity of codoped ceria electrolyte with barium and samarium as dopants. The electrolyte (Ce 0.8 Sm 0.1 Ba 0.1 O 2-δ) powder was synthesized using the citric acid-nitrate combustion method and calcined at 900°C for 5 h. The calcined electrolyte exhibited a cubic fluorite crystal structure with some impurity phases. The calcined powder was then pressed into cylindrical pellets using uniaxial die-pressing. The pellets were sintered at three different temperatures, i.e., 1200, 1300 and 1400°C for 5 h. Microstructural analysis of the pellets showed that the average grain size increased with the increase in sintering temperature. The sintered densities of the pellets were measured by Archimedes' method, and the relative density values were within the range of 78 %TD to 87 %TD as the sintering temperature increased from 1200 to 1400°C. Electrochemical impedance spectroscopy analysis showed that conductivity increased with the increase in sintering temperature, but no considerable change in conductivity was observed for the pellets sintered at 1300 and 1400°C. The results revealed that the electrolyte pellet sintered at 1300°C exhibited the ionic conductivity of 0.005 S/cm with lowest activation energy of 0.7275 eV.

Effects of sintering temperature on the structural and electrochemical properties of SrFe0.5Ti0.5O3‐δ perovskite cathode

“…The densification of the cathode film was detected after sintering at 1200°C (Figure D). This densification increased as the sintering temperature increased to 1300°C (Figure E) . Sintering at 1200°C produced grains with sizes ranging from 1.2 μm to 8.8 μm.…”

Characterizations of Synthetic 8mol% YSZ with Comparison to 3mol %YSZ for HT-SOFC

“…The presence of larger grains with less porosity% will increase the total ionic conductivity in the electrolyte [23]. RD% of the sintered electrolyte was calculated by the Archimedes method [24]. The relative density considered as an essential parameter of linear shrinkage and a degree of electrolyte densification.…”

Effects of Die Configuration on the Electrical Conductivity of Polypropylene Reinforced Milled Carbon Fibers: An Application on a Bipolar Plate

“…The highest intensity obtained for element C is observed at ~28° and ~47°, whereas the peaks at ~13° are designated to C 3 H 6 [44]. The sharpness peaks indicated the crystal structure, which corresponded to the TGA analysis results [45]. The lattice parameter for the MCF/PP composite was 4.002 Å, which was calculated using Equations (2) and (3) [46].…”