Oxygen transport in La1-xSrxMn1-yCoyO3±δ perovskites -: Part I.: Oxygen tracer diffusion

被引：373

作者：

De Souza, RA ^{[1
]}

Kilner, JA ^{[1
]}

机构：

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

来源：

SOLID STATE IONICS | 1998年 / 106卷 / 3-4期

关键词：

oxygen diffusion; IEDP; SIMS; perovskite oxide; LaMnO3; LaCoO3;

D O I：

10.1016/S0167-2738(97)00499-2

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：

Oxygen tracer diffusion coefficients of selected compositions in the La1-xSrxMn1-yCoyO3 +/- delta perovskite oxide system have been measured by means of the Isotopic Exchange Depth Profile method (IEDP). O-18/O-16 exchange anneals were performed at various temperatures between 600 degrees C and 1000 degrees C (P-02 similar to 1 atm), and the subsequent O-18 diffusion profiles determined by Secondary Ion Mass Spectrometry (SIMS). It was seen that, in general, the oxygen tracer diffusivity of these materials increases significantly with strontium site fraction, x, and cobalt site fraction, p. This was attributed to variations in the site fraction of oxygen vacancies, with approximately constant isothermal vacancy diffusivities. The activation enthalpies for oxygen tracer diffusion were also found to be strongly dependent upon composition.

引用

页码：175 / 187

页数：13

共 49 条

[1] Anderson H. U., 1993, P 14 RIS INT S MAT S, P1
[2] ANDERSON HU, 1994, P 2 INT S ION MIX CO, P376
[3] OXYGEN CHEMICAL DIFFUSION IN STRONTIUM DOPED LANTHANUM MANGANITES
BELZNER, A
GUR, TM
HUGGINS, RA
[J]. SOLID STATE IONICS, 1992, 57 (3-4) : 327 - 337
[4] BENSON SJ, 1997, P 3 INT S ION MIX CO
[5] OPTICAL INVESTIGATION OF OXYGEN INCORPORATION IN SRTIO3
BIEGER, T
MAIER, J
WASER, R
[J]. SOLID STATE IONICS, 1992, 53 (pt 1) : 578 - 582
[6] OXYGEN DIFFUSION STUDIES USING NUCLEAR-REACTIONS
CALVERT, JM
DERRY, DJ
LEES, DG
[J]. JOURNAL OF PHYSICS D-APPLIED PHYSICS, 1974, 7 (07) : 940 - 953
[7] OXYGEN-TRANSPORT IN SELECTED NONSTOICHIOMETRIC PEROVSKITE-STRUCTURE OXIDES
CARTER, S
SELCUK, A
CHATER, RJ
KAJDA, J
KILNER, JA
STEELE, BCH
[J]. SOLID STATE IONICS, 1992, 53 : 597 - 605
[8] OXYGEN-ION MIGRATION IN PEROVSKITE-TYPE OXIDES
CHERRY, M
ISLAM, MS
CATLOW, CRA
[J]. JOURNAL OF SOLID STATE CHEMISTRY, 1995, 118 (01) : 125 - 132
[9] Crank J, 1979, MATH DIFFUSION
[10] DESOUZA RA, 1996, THESIS U LONDON

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