| 학회 | 한국화학공학회 |
| 학술대회 | 2005년 봄 (04/22 ~ 04/23, 여수대학교) |
| 권호 | 11권 1호, p.506 |
| 발표분야 | 에너지/환경 |
| 제목 | Oxygen permeability of perovskite ceramics La0.9Sr0.1(Ga1-xMx)0.8Mg0.2O3-y with M=Fe, Ni |
| 초록 | Oxygen permeability of planar type perovskite ceramics was measured using the lab-scale permeation test set. The Arrhenius plots for the logarithm of oxygen permeability versus reciprocal temperature curves for two types of ceramic samples (La0.9Sr0.1(Ga1-xMx)0.8Mg0.2O3-y were shown, one type of which was M=Fe and the other type was M=Ni. Also, the Arrhenius plot of the composite sample with x=0 in La0.2Sr1.8Ga(Fe1-xMgx)O5-x/2 was shown. For three types of the samples, the permeated oxygen was not detected until ~700℃. The Arrhenius plots showed that the highest JO2 values were obtained at the Fe-containing samples with x=0.3 and the composite sample with x=0. The apparent activation energy for oxygen fluxes, Ea, could be explained as almost completely being determined by the oxygen diffusion. The lowest activation energy were measured at x=~0.3 in case of Fe, though Ea evidently decreased with increasing x at lower iron concentrations. This means that the oxygen diffusion activation energy follows the same concentration dependence as the activation energy for oxygen transport measured by the AC-current technique. |
| 저자 | 추고연1, 김태환1, 김권일1, 성재석1, 전재욱2 |
| 소속 | 1한국에너지기술(연), 2한밭대 |
| 키워드 | oxygen permeability; perovskite; Arrhenius plot |
| 원문파일 | 초록 보기 |
