EFFECTS OF SINTERING TEMPERATURE ON THE PERFORMANCE OF SrSc0.1Co0.9O3-δOXYGEN SEMIPERMEABLE MEMBRANE

Abstract

-Our study investigates the influence of sintering temperature on the microstructure (grain size distribution, grain boundary length), electrical conductivity, and oxygen permeation properties of permeation membranes. For this purpose, SrSc 0.1 Co 0.9 O 3-δ samples with different microstructures were prepared by varying the sintering temperature from 1100 to 1250 °C. The average grain sizes were gradually increased, thus the grain boundary lengths decreased with increased sintering temperatures. The influence of the ceramic microstructure on total electrical conductivity was found to be negligible. The oxygen transport properties of the samples were characterized by permeation measurements as a function of temperature in an air/helium oxygen partial pressure gradient. The decrease of the sintering temperature, meaning a decrease of grain size and thus the increase of grain boundary length, leads to an enhanced oxygen permeation flux and a reduced activation energy. This implies that oxygen exchange and transport in the SrSc 0.1 Co 0.9 O 3-δ membranes occur more rapidly along grain boundaries than in the grain bulk.

Photoluminescence characterization and heat treatment effect on luminescence behavior of BaTa2O6:Dy3+ phosphor

“…Depending on the increase in temperature from 1150 to 1425°C, the grain size increased from 0.2‐0.5 μm to 0.8‐2.5 μm, respectively. Grain size growth can be interpretable by a phase transformation from orthorhombic to tetragonal between 1150°C and 1350°C . SEM examination also showed that heat treatment has no effect on the grain shape.…”

Effect of Zr/Gnp hybrid filler on thermal and ablation properties of carbon‐epoxy composites

“…[ 26 ] Therefore, the sintering process may have resulted in lower porosity and strong interfacial bonding among fillers. [ 27 ]…”

Development of TiO2-coated YSZ/silica nanofiber membranes with excellent photocatalytic degradation ability for water purification

“…Nevertheless, conventional multi-layer ceramic membranes (especially MF and UF membranes) have a large number of closed pores, which decreases the gas and pure water permeability relative to electrospun ceramic nanofiber membranes that have an open pore structure 14,57 . For example, the gas permeability of ceramic membranes is approximately 0.001 L/cm 2 min to 0.004 L/cm 2 min, and the pure water permeability is approximately 250 L/m 2 h to 600 L/m 2 h [58][59][60] . Therefore, the gas and pure water permeability of the TiO 2 -coated YSZ/silica NF membranes is much higher than that of ceramic membranes.…”