Oxygen stoichiometry and expansion behavior of Ba0.5Sr0.5Co0.8Fe0.2O3 - δ
Oxygen stoichiometry and expansion behavior of Ba0.5Sr0.5Co0.8Fe0.2O3 - δ
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DOI：
10.1016/j.ssi.2009.11.012
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发表时间：
2010-02-08
影响因子：
3.2
通讯作者：
Toepfer, J.
中科院分区：
文献类型：
--
作者：
Kriegel, R.;Kircheisen, R.;Toepfer, J.
Ba0.5Sr0.5Co0.8Fe0.2O3（-）（delta）（BSCF）的氧化学计量通过500至1000摄氏度之间的等温热重法结合氧化还原滴定法测定。BSCF的氧化学计量分别从在700 ℃下log p（O2）= 0时的2.47变化到在700 ℃下log p（O2）= -5.6时的2.36，以及从在1000 ℃下log p（O2）= 0时的2.42变化到在1000 ℃下log p（O2）= -5.6时的2.25。在T = 500 ℃时，观察到BSCF的部分分解。氧化学计量的变化作为氧分压的函数，在700
The oxygen stoichiometry of Ba0.5Sr0.5Co0.8Fe0.2O3 (-) (delta) (BSCF) was determined by isothermal thermogravimetry between 500 and 1000 degrees C in combination with a redox titration. The oxygen stoichiometry of BSCF varies from 2.47 at log p(O2) = 0 to 2.36 at log p(O2) = -5.6 at 700 degrees C and from 2.42 at log p(O2) = 0 to 2.25 at log p(O2) = -5.6 at 1000 degrees C, respectively. At T = 500 degrees C partial decomposition of BSCF is observed. The variation of the oxygen stoichiometry as a function of oxygen partial pressure between 700