Study of Oxygen Ion Transport in Acceptor Doped Samarium Cobalt Oxide

被引：64

作者：

Fullarton, I. C. ^{[1
]}

Jacobs, J. -P. ^{[2
,3
]}

van Benthem, H. E. ^{[2
,3
]}

Kilner, J. A. ^{[1
]}

Brongersma, H. H. ^{[2
,3
]}

Scanlon, P. J. ^{[2
,3
,4
]}

Steele, B. C. H. ^{[1
]}

机构：

[1] Univ London Imperial Coll Sci Technol & Med, Dept Mat, London SW7 2BP, England

[2] Eindhoven Univ Technol, Fac Phys, NL-5600 MB Eindhoven, Netherlands

[3] Eindhoven Univ Technol, Schuit Inst Catalysis, NL-5600 MB Eindhoven, Netherlands

[4] Queens Univ, Dept Phys, Kingston, ON K7L 3N6, Canada

来源：

IONICS | 1995年 / 1卷 / 01期

关键词：

D O I：

10.1007/BF02426008

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Dense samples of the perovskite Sm(1-x)Sr(x)CoO(3) (where x = 0, 0.2, 0.4, 0.5 and 0.6) have been prepared. The samples were (18)O/(16)O isotopically exchanged at a variety of temperatures between 500 degrees C and 900 degrees C. Subsequent analysis of the diffusion profile using Secondary Ion Mass Spectrometry (SIMS) allowed the oxygen self-diffusion coefficient, D*, and surface exchange coefficient, k, to be determined. From the temperature dependence of these parameters the activation energies for both processes were evaluated. The surface coverage of samarium, cobalt and oxygen in SmCoO(3) was determined from calibration samples using Low Energy Ion Scattering (LEIS). LEIS was used to determine the effect of strontium doping on the surface composition and the (18)O-concentration at the surface of a number of the (18)O-exchanged samples.

引用

页码：51 / 58

页数：8

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