Effects of solvent and chelating agent on synthesis of solid oxide fuel cell perovskite, La0.8Sr0.2CrO3-δ

被引：22

作者：

Lee, Byoung I. ^{[1
]}

Gupta, Ravindra K. ^{[1
]}

Whang, Chin M. ^{[1
]}

机构：

[1] Inha Univ, Sch Mat Sci & Engn, Inchon 402751, South Korea

来源：

MATERIALS RESEARCH BULLETIN | 2008年 / 43卷 / 02期

关键词：

ceramics; sol-gel chemistry; infrared spectroscopy; X-ray diffraction; crystal structure;

D O I：

10.1016/j.materresbull.2007.10.007

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Effects of solvent and chelating agent on synthesis of La0.8Sr0.2CrO3-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. SrCrO4 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 LaCrO3. 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. (c) 2007 Elsevier Ltd. All rights reserved.

引用

页码：207 / 221

页数：15

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