Phase constitution in Sr and Mg doped LaGaO 3 system

Feng Zheng, Rajendra K. Bordia, Larry R. Pederson

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

Sr and Mg doped lanthanum gallate perovskites (La 1-xSr xGa 1-yMg yO 3-δ, shortened as LSGM-XY where X and Y are the doping levels in mole percentage (mol%) at the La- or A-site and the Ga- or B-site, respectively) are promising electrolyte materials for intermediate temperature solid oxide fuel cells (SOFCs). In this study, we have investigated the primary perovskites as well as the secondary phases formed in terms of doping content changes and A/B ratio variations in these materials. Fifteen powder compositions (three doping levels, X=Y=0, 0.1, and 0.2mol; and five A/B ratios 0.95, 0.98, 1.00, 1.02, and 1.05) were synthesized by the glycine-nitrate combustion process (GNP). These powders were equilibrated by calcining at 1500°C for 9h prior to crystalline phase characterization by X-ray powder diffraction (XRD). From the results of this study and the available phase diagrams in the literature on constituent binary oxide systems, we propose a crystalline phase diagram of the La 2O 3-SrO-Ga 2O 3-MgO quaternary system at elevated temperature (1500°C).

Original languageEnglish
Pages (from-to)141-155
Number of pages15
JournalMaterials Research Bulletin
Volume39
Issue number1
DOIs
Publication statusPublished - 3 Jan 2004
Externally publishedYes

Fingerprint

constitution
Doping (additives)
perovskites
Powders
Phase diagrams
phase diagrams
Crystalline materials
gallates
Lanthanum
solid oxide fuel cells
glycine
Solid oxide fuel cells (SOFC)
lanthanum
Nitrates
X ray powder diffraction
Glycine
Oxides
Electrolytes
nitrates
Amino acids

Keywords

  • A. Oxides
  • C. X-ray diffraction
  • D Ionic conductivity
  • D. Crystal structure
  • D. Phase equilibria

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

Cite this

Phase constitution in Sr and Mg doped LaGaO 3 system. / Zheng, Feng; Bordia, Rajendra K.; Pederson, Larry R.

In: Materials Research Bulletin, Vol. 39, No. 1, 03.01.2004, p. 141-155.

Research output: Contribution to journalArticle

Zheng, Feng ; Bordia, Rajendra K. ; Pederson, Larry R. / Phase constitution in Sr and Mg doped LaGaO 3 system. In: Materials Research Bulletin. 2004 ; Vol. 39, No. 1. pp. 141-155.
@article{18b7e8a9bcc44033a879b7cbb185feb9,
title = "Phase constitution in Sr and Mg doped LaGaO 3 system",
abstract = "Sr and Mg doped lanthanum gallate perovskites (La 1-xSr xGa 1-yMg yO 3-δ, shortened as LSGM-XY where X and Y are the doping levels in mole percentage (mol{\%}) at the La- or A-site and the Ga- or B-site, respectively) are promising electrolyte materials for intermediate temperature solid oxide fuel cells (SOFCs). In this study, we have investigated the primary perovskites as well as the secondary phases formed in terms of doping content changes and A/B ratio variations in these materials. Fifteen powder compositions (three doping levels, X=Y=0, 0.1, and 0.2mol; and five A/B ratios 0.95, 0.98, 1.00, 1.02, and 1.05) were synthesized by the glycine-nitrate combustion process (GNP). These powders were equilibrated by calcining at 1500°C for 9h prior to crystalline phase characterization by X-ray powder diffraction (XRD). From the results of this study and the available phase diagrams in the literature on constituent binary oxide systems, we propose a crystalline phase diagram of the La 2O 3-SrO-Ga 2O 3-MgO quaternary system at elevated temperature (1500°C).",
keywords = "A. Oxides, C. X-ray diffraction, D Ionic conductivity, D. Crystal structure, D. Phase equilibria",
author = "Feng Zheng and Bordia, {Rajendra K.} and Pederson, {Larry R.}",
year = "2004",
month = "1",
day = "3",
doi = "10.1016/S0025-5408(03)00140-5",
language = "English",
volume = "39",
pages = "141--155",
journal = "Materials Research Bulletin",
issn = "0025-5408",
publisher = "Elsevier Limited",
number = "1",

}

TY - JOUR

T1 - Phase constitution in Sr and Mg doped LaGaO 3 system

AU - Zheng, Feng

AU - Bordia, Rajendra K.

AU - Pederson, Larry R.

PY - 2004/1/3

Y1 - 2004/1/3

N2 - Sr and Mg doped lanthanum gallate perovskites (La 1-xSr xGa 1-yMg yO 3-δ, shortened as LSGM-XY where X and Y are the doping levels in mole percentage (mol%) at the La- or A-site and the Ga- or B-site, respectively) are promising electrolyte materials for intermediate temperature solid oxide fuel cells (SOFCs). In this study, we have investigated the primary perovskites as well as the secondary phases formed in terms of doping content changes and A/B ratio variations in these materials. Fifteen powder compositions (three doping levels, X=Y=0, 0.1, and 0.2mol; and five A/B ratios 0.95, 0.98, 1.00, 1.02, and 1.05) were synthesized by the glycine-nitrate combustion process (GNP). These powders were equilibrated by calcining at 1500°C for 9h prior to crystalline phase characterization by X-ray powder diffraction (XRD). From the results of this study and the available phase diagrams in the literature on constituent binary oxide systems, we propose a crystalline phase diagram of the La 2O 3-SrO-Ga 2O 3-MgO quaternary system at elevated temperature (1500°C).

AB - Sr and Mg doped lanthanum gallate perovskites (La 1-xSr xGa 1-yMg yO 3-δ, shortened as LSGM-XY where X and Y are the doping levels in mole percentage (mol%) at the La- or A-site and the Ga- or B-site, respectively) are promising electrolyte materials for intermediate temperature solid oxide fuel cells (SOFCs). In this study, we have investigated the primary perovskites as well as the secondary phases formed in terms of doping content changes and A/B ratio variations in these materials. Fifteen powder compositions (three doping levels, X=Y=0, 0.1, and 0.2mol; and five A/B ratios 0.95, 0.98, 1.00, 1.02, and 1.05) were synthesized by the glycine-nitrate combustion process (GNP). These powders were equilibrated by calcining at 1500°C for 9h prior to crystalline phase characterization by X-ray powder diffraction (XRD). From the results of this study and the available phase diagrams in the literature on constituent binary oxide systems, we propose a crystalline phase diagram of the La 2O 3-SrO-Ga 2O 3-MgO quaternary system at elevated temperature (1500°C).

KW - A. Oxides

KW - C. X-ray diffraction

KW - D Ionic conductivity

KW - D. Crystal structure

KW - D. Phase equilibria

UR - http://www.scopus.com/inward/record.url?scp=0347594755&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0347594755&partnerID=8YFLogxK

U2 - 10.1016/S0025-5408(03)00140-5

DO - 10.1016/S0025-5408(03)00140-5

M3 - Article

VL - 39

SP - 141

EP - 155

JO - Materials Research Bulletin

JF - Materials Research Bulletin

SN - 0025-5408

IS - 1

ER -