摘要
介绍了对SrCo0．8Fe0．2O3-δ、SrCo0．8Fe0.1Sn0．1O3-δ两种透氧膜材料相组成、热学性能及氧渗透性能的研究,发现实验中获得的SrCo0.8Fe0．2O3-δ透氧膜材料具有长期的相组成稳定性;在它的B位进一步用Sn取代部分Fe,获得名义组成SrCo0.8Fe0．1Sn0．1O3-δ样品,具有典型的双相组成特征．与单相SrCo0．8Fe0．2O3-δ相比,双相结构SrCo0．8Fe0．1Sn0．1O3-δ样品的热膨胀率降低,抗热冲击性能增加显著;同时,氧渗透性能也有一定程度的提高,如1．2mm厚的SrCo0．8Fe0．2O3-δ陶瓷膜样品在1000℃具有1．87×10-6mol·cm-2·s-1的透氧率(Po2(h)=2．09×104Pa,Po2(1)=1．2×103Pa),同样条件下的SrCo0．8Fe0．1Sn0.1O3-δ样品透氧率为2．49×10-6mol·cm-2·S-1．
The phase composition, thermal shocking resistance and the separating properties of both SrCo0.8Fe0.2O3-δ （SCF） and SrCo0.8Fe0.1Sn0.1O3-δ （SSCF） membranes were investigated systematically. It was found the as prepared SCF had long-term phase stability, and the SSCF had the composite feature with dual phase composition. As compared with the SCF, the SSCF had a more promoted thermal shocking resistance, which related to the decreasing of thermal expansion coefficient of it in comparison with the former. Furthermore, a permeation rate of 1.87×10^-6mol.cm^-2.s^-1 was obtained on the as-prepared SCF membrane at 1000℃ and under oxygen partial pressure gradient of the Po2（h）/Po2（1）=0.209atm /0.012atm, and at the same measuring condition, the permeability was 2.49× 10^-6mol.cm^-2.s^-1 for the as prepared SSCF one.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2006年第5期1141-1146,共6页
Journal of Inorganic Materials
基金
国家自然科学基金(50332040)
关键词
氧渗透
钙钛矿结构
陶瓷膜
抗热冲击性能
oxygen permeation
perovskite structure
ceramic membrane
thermal shocking resistance
