Preparation and characterisation of La1-xSrxGa1-yMgyO3-(x plus y)/2 for the investigation of cation diffusion processes

被引：50

作者：

Schulz, O ^{[1
]}

Martin, M ^{[1
]}

机构：

[1] Darmstadt Univ Technol, Inst Chem Phys, D-64287 Darmstadt, Germany

来源：

SOLID STATE IONICS | 2000年 / 135卷 / 1-4期

关键词：

La1-xSrxGa1-yMgyO3-(x+y)/2; Pechini method; SOFC; radiotracer method; cation diffusion;

D O I：

10.1016/S0167-2738(00)00436-7

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：

Polycrystalline, dense samples of lanthanum gallate doped with strontium on the A and magnesium on the B site, La1-xSrxGa1-yMgyO3-(x+y)/2 (LSGM), were prepared using the Pechini method. Characterisation by X-ray diffraction (XRD) showed that the resulting samples annealed at 1400 degreesC in air are single phase. Using in situ XRD measurements the dissociation and crystallisation of the amorphous precursor powders of the Pechini preparation was followed up to 1100 degreesC. First results for the cation diffusion coefficients of gallium, iron and manganese were obtained by the radiotracer sectioning method. Two different mechanisms (grain boundary and bulk diffusion) were found and ratios of grain boundary to bulk diffusion coefficients were obtained. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：549 / 555

页数：7

共 10 条

[1]

HAMMOU A, 1996, CRC HDB SOLID STATE, P407

[2] INFLUENCE OF DISLOCATIONS ON DIFFUSION KINETICS IN SOLIDS WITH PARTICULAR REFERENCE TO ALKALI HALIDES [J].

HARRISON, LG .

TRANSACTIONS OF THE FARADAY SOCIETY, 1961, 57 (08) :1191-&

[3] Cation diffusion in (La,Ca)CrO3 perovskite by SIMS [J].

Horita, T ;

Ishikawa, M ;

Yamaji, K ;

Sakai, N ;

Yokokawa, H ;

Dokiya, M .

SOLID STATE IONICS, 1998, 108 (1-4) :383-390

[4] Wet chemical synthesis of Sr- and Mg-doped LaGaO3, a perovskite-type oxide-ion conductor [J].

Huang, KQ ;

Goodenough, JB .

JOURNAL OF SOLID STATE CHEMISTRY, 1998, 136 (02) :274-283

[5]

HUANG P, 1996, J ELECTROCHEM SOC, V134, P1644

[6]

MARTIN M, IN PRESS SOLID STATE

[7]

Pechini M.P, 1967, US Pat. Off., Patent No. [3330697, 3,330,697]

[8] Point defects and grain boundary diffusion in NiO and Fe3O4 [J].

Stubican, VS ;

Carinci, LR .

ZEITSCHRIFT FUR PHYSIKALISCHE CHEMIE-INTERNATIONAL JOURNAL OF RESEARCH IN PHYSICAL CHEMISTRY & CHEMICAL PHYSICS, 1998, 207 :215-222

[9]

Suzuoka T., 1961, T JAPAN I METALS, V2, P25

[10] Kinetic demixing of (Co,Ni)O in an electric field [J].

Teller, O ;

Martin, M .

SOLID STATE IONICS, 1997, 101 :475-478

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