Abstract
New dense composites comprised of a lanthanium manganite system, (La1xSrx)(Mn0.85Fe0.05Co0.05Ni0.05)O3+δ (LSMFCN, Sr2+ (x) = 0∼0.4 mole) and yttria-stabilized zirconia (YSZ) were fabricated for use as oxygen separation membranes. The densification behavior of the LSMFCN/YSZ composites were studied by sintering with different ratios of LSMFCN and YSZ at various temperatures in air. A density of about 95% was achieved for a sintering temperature of 1200°C. The electrical conductivity of the LSMFCN0/YSZ composites as a function of reciprocal absolute temperature with various YSZ contents was measured. The activation energies for conduction below and above 500°C were about 89 kJ/mol and 68 kJ/mol, respectively. The oxygen permeation flux increased until the YSZ concentration was 60 wt. %, then decreased at 80 wt. % of YSZ. The oxygen permeation flux of the 0.5 mm composite membrane was 1.06 sccm/cm2 at a 4:6 mixed ratio of LSMFCN0 /YSZ at 1200°C.
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Choi, H., Kim, E.Y. & Whang, C.M. Synthesis, oxygen permeation, and electrical properties of (La1−xSrx)(Mn0.85Fe0.05Co0.05Ni0.05)O3+δ -YSZ composite. Electron. Mater. Lett. 7, 231–236 (2011). https://doi.org/10.1007/s13391-011-0910-4
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DOI: https://doi.org/10.1007/s13391-011-0910-4