Ionic transport in SrCo0.85Ti0.15O3-δ ceramics at high oxygen pressures

被引：9

作者：

Kharton, VV ^{[1
]}

Viskup, AP ^{[1
]}

Yaremchenko, AA ^{[1
]}

Kerko, PF ^{[1
]}

Naumovich, EN ^{[1
]}

Kovalevsky, AV ^{[1
]}

机构：

[1] Belarusian State Univ, Inst Physicochem Problems, Minsk 220080, BELARUS

来源：

MATERIALS RESEARCH BULLETIN | 1999年 / 34卷 / 12-13期

关键词：

ceramics; oxides; electrical properties; ionic conductivity;

D O I：

10.1016/S0025-5408(99)00192-0

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Oxygen permeation through dense ceramic membranes of the SrCo0.85Ti0.15O3-delta cubic perovskite solid solution was studied in the range of the membrane feed-side oxygen partial pressures (p(2)) 0.21 to 100 atm at temperatures of 850-1040 K. The dependence of the oxygen fluxes on membrane thickness suggests that bulk ionic conductivity is the permeation-determining factor at high oxygen pressures (p(2) > 1 atm). Increasing the oxygen pressure up to 80-100 atm was found to result in a drastic increase of the permeation flux, accompanied by a partial decomposition of the cubic perovskite phase of SrCo0.85Ti0.15O3-delta, forming two isostructural perovskite-type phases. No phase changes were observed after testing ceramics in the oxygen pressure range of 1-60 atm. The high oxygen permeation fluxes obtained demonstrate the applicability of SrCo0.85Ti0.15O3-delta membranes at high oxygen pressures. (C) 2000 Elsevier Science Ltd.

引用

页码：1921 / 1928

页数：8

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