Effects of solvent and chelating agent on synthesis of solid oxide fuel cell perovskite, La{sub 0.8}Sr{sub 0.2}CrO{sub 3-{delta}}

Journal Article · Tue Feb 05 00:00:00 EST 2008 · Materials Research Bulletin

DOI:https://doi.org/10.1016/j.materresbull.2007.10.007· OSTI ID:21068185

Lee, Byoung I; Gupta, Ravindra K ^[1]

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1. School of Materials Science and Engineering, Inha University, 253, Yonghyun-dong, Nam-Gu, Incheon 402-751 (Korea, Republic of)

Effects of solvent and chelating agent on synthesis of La{sub 0.8}Sr{sub 0.2}CrO{sub 3-{delta}} perovskite are reported. Samples are synthesized using a solvent (ethylene glycol or 2-methoxyethanol) and a chelating agent (acetylacetone, citric acid or ethylene diamine tetraacetic acid) by polymeric-gel method, and characterized by X-ray diffractometry and Fourier-transform infrared spectroscopy. Citric acid to metal cations molar ratio (Rc) is varied for ethylene glycol-citric acid system. Samples are mainly orthorhombic perovskite. SrCrO{sub 4} is appeared as a secondary phase and found to be the lowest for ethylene glycol-citric acid combination with Rc equal to 7. Crystallographic parameters of perovskite phase are determined and compared with those of LaCrO{sub 3}. A mechanism employing a partial-charge model, chelating effect and solvent-cage effect is proposed to explain the results. Effect of sintering temperature on phase, relative density and morphology of samples prepared using ethylene glycol and citric acid (Rc = 7) is also reported.

• OSTI ID: 21068185
• Journal Information: Materials Research Bulletin, Vol. 43, Issue 2; Other Information: DOI: 10.1016/j.materresbull.2007.10.007; PII: S0025-5408(07)00443-6; Copyright (c) 2007 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ABSORPTION SPECTROSCOPY
ACETYLACETONE
CERAMICS
CHEMICAL PREPARATION
CHROMIUM COMPOUNDS
CITRIC ACID
CRYSTALLOGRAPHY
EDTA
FOURIER TRANSFORM SPECTROMETERS
GLYCOLS
INFRARED SPECTRA
LANTHANUM COMPOUNDS
ORTHORHOMBIC LATTICES
OXIDES
PEROVSKITE
SINTERING
SOL-GEL PROCESS
SOLID OXIDE FUEL CELLS
SOLVENTS
STRONTIUM COMPOUNDS
X-RAY DIFFRACTION