Preparation of La0.3Sr0.7CoO3−δ perovskite by thermal decomposition of metal-EDTA complexes

Doorn, R.H.E. van; Kruidhof, H.; Nijmeijer, Arian; Winnubst, Louis; Burggraaf, A.J.

doi:10.1039/a800500a

Cited by 53 publications

(23 citation statements)

References 5 publications

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“…At this point, when most of the organic matter is destroyed and the removal of organic carbonates formed during the process is complete, start the consolidation of the oxide compound. The nature of the compounds that persist in this stage have been discussed in the literature [14,15] and according to different reports, is clear the formation of carbonate species, and other intermediate oxo-carbonates formed in the synthesis process (zone V) [16,17]. Slight variations of mass that appear in IV and V zones at 488 and 626 ºC, respectively, corresponding to decomposition of secondary species and solid oxide reorganization (Figure 2).…”

Section: Resultsmentioning

confidence: 99%

Preparation and Characterization of Perovskite Oxides by Polymerization-Combustion

Cuaspud

Valencia-Ríos

Carda-Castelló

2010

J. Chil. Chem. Soc.

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This paper describes the preparation of La 0.75 Sr 0.25 Cr 0.2 Fe 0.8 O 3 perovskite oxide, using a polymerization-combustion route, to obtain materials for potential applications like electrodes in solid oxide fuel cells (SOFC). For such purpose, initially the solid precursor was characterized by FT-IR spectroscopy and thermal analysis (TGA-DTA), showing the obtention of polymeric citrate precursors. The thermal analysis (TGA-DTA), X-ray diffraction (XRD) and scanning electronic microscopy (SEM), provides information about the formation of a perovskite phase, while the texture, relief and roughness found are characteristic of the method of synthesis used. The size of crystallites, calculated using the Scherrer calculator software and transmission electron microscopy (TEM), confirmed the presence of nanometric crystallites (< 41.0 nm), whereas the chemical composition and crystallographic structure, indicating a high correlation with respect to proposed system, which was confirmed by X-ray fluorescence (XRF), energy dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD). Finally the electrical characterization by impedance spectroscopy (IS), determined the capacitance and resistance of the system in order to provide information related to the concentration of charge carriers and the diffusion rate of ions in the material a high conductivity values, related to semiconductor behavior for potential applications.

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Section: Resultsmentioning

confidence: 99%

Preparation and Characterization of Perovskite Oxides by Polymerization-Combustion

Cuaspud

Valencia-Ríos

Carda-Castelló

2010

J. Chil. Chem. Soc.

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“…La \V Sr V CoO \ powder was prepared by thermal decomposition of precursor complexes derived from nitrate solutions using ethylenediaminetetraacetetic acid (EDTA) as a complexing agent (21,22). The resulting powder was milled several hours and calcined at 925°C in stagnant air for 10 h. Disks were obtained by uniaxially static pressing at 1.5 bar followed by isostatic pressing at 4000 bar.…”

Section: Sample Preparationmentioning

confidence: 99%

High-Temperature Coulometric Titration of La1−xSrxCoO3−δ: Evidence for the Effect of Electronic Band Structure on Nonstoichiometry Behavior

Lankhorst

Bouwmeester

Verweij

1997

Journal of Solid State Chemistry

128

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“…2(a) and 2(b) shows the microstructure of the membrane prepared from the powder synthesized using the SSR method. It exhibits liquid phase sintering, different from that of La 1−x Sr x Co 1−y Fe y O 3−δ type oxide membranes [12,14]. Clear grain boundaries are found on the surface with a grain size of around 5 μm.…”

Section: Methodsmentioning

confidence: 93%

Synthesis and characterization of Ba0.5Sr0.5Co0.8Fe0.2O3−σ

et al. 2009

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Perovskite-type Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3−δ (BSCFO) powders were synthesized using two methods, solid-state reaction (SSR) method and citrate-EDTA complexing method (CC-EDTA). Then the powders were pressed to green disks of 19 mm in diameter and sintered at 1140°C for 5 h. The shrinkage rate and relative density of the membranes prepared from the perovskite-type powders were determined and calculated, and the powders and derived membranes were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results show that the shrinkage rates of the two kinds of disks are nearly the same (about 10%). The disks prepared by the SSR method had a bigger grain size and lower relative density than those prepared by the CC-EDTA method. The conductivity of the membranes prepared by the SSR method was about 38 S/cm, higher than that of the membranes prepared by the CC-EDTA method, which was about 30 S/cm, at the same temperature of 600°C.

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Preparation of La0.3Sr0.7CoO3−δ perovskite by thermal decomposition of metal-EDTA complexes

Cited by 53 publications

References 5 publications

Preparation and Characterization of Perovskite Oxides by Polymerization-Combustion

Preparation and Characterization of Perovskite Oxides by Polymerization-Combustion

High-Temperature Coulometric Titration of La1−xSrxCoO3−δ: Evidence for the Effect of Electronic Band Structure on Nonstoichiometry Behavior

Synthesis and characterization of Ba0.5Sr0.5Co0.8Fe0.2O3−σ

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