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Structural and chemical properties of cerium-magnetoplumbite in cerium based IT-SOFC compounds

A. M. VLAICU1,* , I. MERCIONIU1, B. S. VASILE2, C. C. NEGRILA1, C. LOGOFATU1, N. C. CRETU3, P. NITA4, N. POPESCU-POGRION1

Affiliation

  1. National Institute of Material Physics, Atomistilor str. 105 bis, PO Box MG. 7, 077125- Magurele, Romania
  2. University Politehnica-Bucurest, Faculty of Applied Chemistry and Material Science, 1-7, Gh. Polizu str., Bucharest, Romania
  3. University Transilvania Brasov, Faculty of Technological Engineering and Industrial Management, Physics Department, Colina Universitatii nr. 1, corp A, 500036 Brasov, Romania
  4. S.C. Metav-Cercetare Dezvoltare S.A., C.A. Rosetti str. 31, Sector 2 Bucharest

Abstract

Yttria doped ceria reinforced with yttria doped alumina compound for IT-SOFC applications has been prepared by sol-gel method and sintered at 1300 oC, 1400 oC, 1500 oC. XRD, and SEM show the presence of a needle-like cerium-magnetoplumbite (CeAl11O17) phase in the compound; the oxygen deficient phase grows from the alumina phase by using ceria from the surrounding matrix and releasing oxygen ions As the sintering temperature is increased, the alumina phase is gradually transformed into CeAl11O17. Compared to the yttria doped ceria without reinforcement, the obtained compounds with ceria-magnetoplumbite show only a slight decrease of the Young elasticity modulus. However, the samples become brittle after backing in oxygen atmosphere (1000 oC, and 1500 oC)..

Keywords

IT-SOFC, Cerium-magnetoplumbite, Sol-gel, XRD, SEM, XPS.

Citation

A. M. VLAICU, I. MERCIONIU, B. S. VASILE, C. C. NEGRILA, C. LOGOFATU, N. C. CRETU, P. NITA, N. POPESCU-POGRION, Structural and chemical properties of cerium-magnetoplumbite in cerium based IT-SOFC compounds, Optoelectronics and Advanced Materials - Rapid Communications, 5, 2, February 2011, pp.143-145 (2011).

Submitted at: Feb. 2, 2011

Accepted at: Feb. 17, 2011