Fabrication of Porous YSZ from ZnO-YSZ Cermet

Hwang, Moon Jin; Han, Chong

doi:10.4028/3-908451-31-0.235

Cited by 1 publication

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…12,13 Some studies of porosity from oxides leached with acid have also been reported: MgO from Ce0.8Gd0.2O, 14 and ZnO from Y0.08Zr0.92O2. 15 In this work, we have investigated whether oxide leaching was compatible with thermoplastic feedstocks previously developed 7 for extrusion of Y0.03Zr0.97O2 (3YSZ or 3Y-TZP) porous oxygen transport membrane supports, and to what extent the non-pyrolyzable pore formers could improve the gas permeability of the pore network generated by pyrolyzable pore formers. We chose MgO as the non-pyrolyzable pore former due to its low cost and toxicity, solubility in water, and high reactivity towards weak acids also as an oxide.…”

Section: Introductionmentioning

confidence: 99%

MgO as a non-pyrolyzable pore former in porous membrane supports

Haugen

Geffroy²,

Kaiser

et al. 2018

Journal of the European Ceramic Society

View full text Add to dashboard Cite

The gas permeability of Y0.03Zr0.97O2 (3Y-TZP) porous supports from thermoplastic feedstocks has been improved by adding MgO as a non-pyrolyzable pore former. Common pyrolyzable pore formers such as graphite often produce tortuous and narrow pore channels with low gas permeability, limiting the performance of oxygen transport membranes or other membranes relying on gas transport to the active membrane surface. Thermoplastic feedstocks for extrusion of tubular 3Y-TZP supports were prepared with four different amounts of pyrolyzable pore formers and/or MgO as non-pyrolyzable pore former. The MgO was removed after sintering by leaching in acetic acid. With this technique we obtained porosities above 70 vol% and gas permeabilities above 3•10-14 m 2. Compared to samples with only pyrolyzable pore formers, the non-pyrolyzable pore former increases the gas permeability and reduces the tortuosity.

show abstract