Synthesis of mixed conducting oxides by an organic steric entrapment method

W. M. Kriven, B. R. Rosczyk, M. I. Bertoni, Thomas O Mason

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

Three compounds currently of interest as solid oxide fuel cell components (SOFC's) have been synthesized by the organic steric entrapment method. They were doped lanthanum gallate (La0.8Sr0.2Ga0.83Mg0.17O 0.2815) or "LSGM", samarium doped, cerium oxide (Ce0.8Sm0.2O2-δ) and strontium iron cobaltite (SrFeCo0.5O3-δ). While XRD results indicated that the Ce0.8Sm0.2O2-δ, SrFeCo0.5Ox and LSGM specimens were single phase, SEM observations showed the presence of a grain boundary phase homogeneously surrounding grains in the LSGM specimen. Pellets of LSGM were measured by AC impedance spectroscopy, yielding reliable data in the temperature range from 340°C to 830°C. Some degree of microcracking was also observed in the LSGM microstructure which is most likely responsible for the reduced conductivities vis-à-vis the best literature values. The LSGM here fabricated was fine grained (∼4 μm in diameter) as compared to the ∼15μm of previous literature such that grain boundaries will play a more dominant role. Elongated grains were clearly present in the SrFeCo0.5Ox microstructure.

Original languageEnglish
Title of host publicationCeramic Engineering and Science Proceedings
EditorsW.M. Kriven, H.-T Lin
Pages287-292
Number of pages6
Volume24
Edition3
Publication statusPublished - 2003
EventCeramic Engineering And Science Proceedings: 27th International Cocoa Beach Conference on Advanced Ceramics and Composites:A - Cocoa Beach, FL, United States
Duration: Jan 26 2003Jan 31 2003

Other

OtherCeramic Engineering And Science Proceedings: 27th International Cocoa Beach Conference on Advanced Ceramics and Composites:A
CountryUnited States
CityCocoa Beach, FL
Period1/26/031/31/03

Fingerprint

Oxides
Grain boundaries
Samarium
Lanthanum
Microcracking
Strontium
Microstructure
Cerium
Solid oxide fuel cells (SOFC)
Iron
Spectroscopy
Scanning electron microscopy
Temperature
cobaltite
ceric oxide

ASJC Scopus subject areas

  • Ceramics and Composites

Cite this

Kriven, W. M., Rosczyk, B. R., Bertoni, M. I., & Mason, T. O. (2003). Synthesis of mixed conducting oxides by an organic steric entrapment method. In W. M. Kriven, & H. -T. Lin (Eds.), Ceramic Engineering and Science Proceedings (3 ed., Vol. 24, pp. 287-292)

Synthesis of mixed conducting oxides by an organic steric entrapment method. / Kriven, W. M.; Rosczyk, B. R.; Bertoni, M. I.; Mason, Thomas O.

Ceramic Engineering and Science Proceedings. ed. / W.M. Kriven; H.-T Lin. Vol. 24 3. ed. 2003. p. 287-292.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Kriven, WM, Rosczyk, BR, Bertoni, MI & Mason, TO 2003, Synthesis of mixed conducting oxides by an organic steric entrapment method. in WM Kriven & H-T Lin (eds), Ceramic Engineering and Science Proceedings. 3 edn, vol. 24, pp. 287-292, Ceramic Engineering And Science Proceedings: 27th International Cocoa Beach Conference on Advanced Ceramics and Composites:A, Cocoa Beach, FL, United States, 1/26/03.
Kriven WM, Rosczyk BR, Bertoni MI, Mason TO. Synthesis of mixed conducting oxides by an organic steric entrapment method. In Kriven WM, Lin H-T, editors, Ceramic Engineering and Science Proceedings. 3 ed. Vol. 24. 2003. p. 287-292
Kriven, W. M. ; Rosczyk, B. R. ; Bertoni, M. I. ; Mason, Thomas O. / Synthesis of mixed conducting oxides by an organic steric entrapment method. Ceramic Engineering and Science Proceedings. editor / W.M. Kriven ; H.-T Lin. Vol. 24 3. ed. 2003. pp. 287-292
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