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Spark plasma sintering studies of nanosize lanthanidedoped ceria obtained by sol-gel method

C. PLAPCIANU1,* , C. VALSANGIACOM1, JEREMY E. SCHAFFER2, A.WIEG3, J. GARAY3, L. STANCIU2,4

Affiliation

  1. NIMP, Department of Solid State Magnetism and Superconductivity, Bucharest-Magurele, Romania,
  2. Purdue University, School of Biomedical Engineering, West Lafayette, IN, USA,
  3. University of California Riverside, Riverside, CA, USA,
  4. Purdue University, School of Materials Engineering, West Lafayette, IN, USA

Abstract

Doped ceria powders, Ce0.8 Ln0.2O2-x (Ln = Gd3+, Sm3+ and Yb3+) were sintered to nearly full density by Spark Plasma Sintering at 1100 and 1200ºC. The starting powders were obtained via a sol-gel method and had nanometric dimensions: 26.4 nm (Gd), 19.3 nm (Sm) and 31.4 nm (Yb). Samples characterization was performed by SEM, TEM and XRD to determine their structural and microstructural characteristics. The ionic conductivities of the sintered samples were determined by impedance measurements. The influence of the chemical composition, sintering temperature and microstructural characteristics on the total ionic conductivity were evaluated and discussed..

Keywords

Lanthamide doped Ceria, Spark plasma sintering sol-gel method.

Submitted at: May 5, 2011
Accepted at: Sept. 15, 2011

Citation

C. PLAPCIANU, C. VALSANGIACOM, JEREMY E. SCHAFFER, A.WIEG, J. GARAY, L. STANCIU, Spark plasma sintering studies of nanosize lanthanidedoped ceria obtained by sol-gel method, Journal of Optoelectronics and Advanced Materials Vol. 13, Iss. 9, pp. 1101-1108 (2011)