Total conductivity, oxygen permeability and stability of perovskite-type oxide BaCo0.7Fe0.2Nb0.1O3−δ
Total conductivity, oxygen permeability and stability of perovskite-type oxide BaCo0.7Fe0.2Nb0.1O3−δ
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DOI：
10.1007/s12598-009-0040-4
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发表时间：
2009-03
期刊：
影响因子：
8.8
通讯作者：
Yuwen Zhang;Yong Liu;Cheng Wang;Zhibin Yang;W. Ding;Xionggang Lu
中科院分区：
文献类型：
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作者：
Yuwen Zhang;Yong Liu;Cheng Wang;Zhibin Yang;W. Ding;Xionggang Lu
研究了纯钙钛矿型氧化物BaCo0.7Fe0.2Nb0.1O3−δ（BCFNO）在真实的工作条件下的总电导率、吸氧性能、透氧性能和稳定性。在600°C下测得其总电导率为3.6 S·cm− 1。虽然BCFNO膜的总电导率远小于Ba0.5Sr0.5Co0.8Fe0.2O3-δ（BSCFO）膜的电导率，但BCFNO膜的氧渗透率与BSCFO膜的氧渗透率相似。对BCFNO和BSCFO膜的SEM观察和EDX分析表明，在实验条件下，未发现BCFNO膜中金属离子的偏析，而BSCFO的原始钙钛矿相在实验条件下分解。透氧性和稳定性的实验结果与钙钛矿的吸氧性能分析相一致。
The total conductivity, oxygen sorption property, oxygen permeability and stability of pure perovskite-type oxide BaCo0.7Fe0.2Nb0.1O3−δ(BCFNO) in real operating conditions were investigated. Its total conductivity was measured to be 3.6 S·cm−1at 600°C. Though the total conductivity of the BCFNO membrane is much smaller than that of the Ba0.5Sr0.5Co0.8Fe0.2O3−δ(BSCFO) membrane, the oxygen permeability of the BCFNO membrane is similar to that of the BSCFO membrane. SEM observation and EDX analysis of the BCFNO and BSCFO membranes indicated that no segregation of metal ions was found for the used BCFNO membrane while the original perovskite phase of BSCFO decomposed under the experimental condition. The experimental results of oxygen permeability and stability were consistent with the analysis on the oxygen sorption property of perovskites.