Modification of mixed conducting Ba0.5Sr0.5Co0.8Fe0.2O3-δ by partial substitution of cobalt with tungsten

被引：4
|
作者：
Popov, M. P. [1 ]
Bychkov, S. F. [1 ]
Nemudry, A. P. [1 ,2 ]
机构：
[1] Russian Acad Sci, Inst Solid State Chem & Mechanochem, Siberian Branch, Novosibirsk, Russia
[2] Novosibirsk State Univ, Novosibirsk, Russia
来源：
RUSSIAN JOURNAL OF ELECTROCHEMISTRY | 2016年 / 52卷 / 07期
基金：
俄罗斯基础研究基金会;
关键词：
nonstoichiometric oxides; perovskites; oxygen permeability; capillary membranes; BSCF; modification; OXYGEN SEPARATION; PHASE-STABILITY; MEMBRANES; PERMEABILITY; PERMEATION; OXIDES; NONSTOICHIOMETRY; PEROVSKITES; METHANE; DELTA;
D O I：
10.1134/S1023193516070156
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
The Ba0.5Sr0.5Co0.8-x W (x) Fe0.2O3-delta (N... = 0-0.1) materials prepaMIECred by partial substitution of cobalt in BSCF with tungsten were studied. The tungsten solubility limit in the structure of cubic perovskite BSCF was shown to be similar to 2%. The doping with the highly charged W6+ (2%) cation improved the functional properties of BSCF: it increased the oxygen permeability and membrane stability in the CO2-containing atmosphere and suppressed the cubic-hexagonal perovskite polymorphic transition. This stabilizes high oxygen fluxes during long-term stability tests.
引用
收藏
页码：648 / 654
页数：7
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