Oxygen permeation in Sr- and Mg-doped LaAlO3 and Gd-doped CeO2 at high temperature
SCIE
SCOPUS
- Title
- Oxygen permeation in Sr- and Mg-doped LaAlO3 and Gd-doped CeO2 at high temperature
- Authors
- Park, HJ; Choi, GM
- Date Issued
- 2004-11-30
- Publisher
- ELSEVIER SCIENCE BV
- Abstract
- The oxygen fluxes of acceptor-doped LaAlO3 (La0.9Sr0.1Al0.9Mg0.1O3-delta, LSAN19191) and ceria (Ce0.8Gd0.2O2-delta, GDC20) were measured and compared as a function of temperature (1300-1600 degreesC) and oxygen partial pressure (P-O2=0.21-10(-9) atm). The oxygen permeation driven by P-O2 gradient was measured by either gas chromatograph or oxygen sensor. The measured oxygen fluxes were compared with those estimated from the measured (GDC20) or the reported (LSAM9191) electrical conductivity [Solid State Ionics 154 (2002) 535]. The oxygen flux of GDC20 was about one order of magnitude higher than that of LSAM9191 in most P-O2 gradient. (C) 2004 Elsevier B.V. All rights reserved.
- Keywords
- membrane; permeation; LaAlO3; ceria; electrolyte; mixed conductivity; ELECTRICAL-CONDUCTIVITY; STABILIZED ZIRCONIA; SURFACE EXCHANGE; TRANSPORT; MEMBRANES; DIFFUSION; OXIDATION
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/24858
- DOI
- 10.1016/j.ssi.2004.03.048
- ISSN
- 0167-2738
- Article Type
- Article
- Citation
- SOLID STATE IONICS, vol. 175, no. 1-4, page. 399 - 403, 2004-11-30
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