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Ionic conductivity in nanocrystalline Gd doped ceria

  • Gianguido Baldinozzi (a1), David Simeone (a1), Dominique Gosset (a1), Mickael Dollé (a1) and Georgette Petot-Ervas (a1)...


We have synthesized Gd-doped ceria polycrystalline samples (5, 10, 15 %mol), having relative densities exceeding 95% and grain sizes between 30 and 160 nm after axial hot pressing (750 °C, 250 MPa). The samples were prepared by sintering nanopowders obtained by sol-gel chemistry methods having a very narrow size distribution centered at about 16 nm. SEM and X-ray diffraction were performed to characterize the sample microstructures and to assess their structures. We report ionic conductivity measurements using impedance spectroscopy. It is important to investigate the properties of these systems with sub-micrometric grains and as a function of their composition. Therefore, samples having micrometric and nanometric grain sizes (and different Gd content) were studied. Evidence of Gd segregation near the grain boundaries is given and the impact on the ionic conductivity, as a function of the grain size and Gd composition, is discussed and compared to microcrystalline samples.



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i Baldinozzi, G., Simeone, D., Gosset, D., Dutheil, M., Neutron Diffraction Study of the Size-Induced Tetragonal to Monoclinic Phase Transition in Zirconia Nanocrystals, Phys. Rev. Let. 90 (2003) 216103
ii Simeone, D., Baldinozzi, G., Gosset, D., LeCaer, S., Mazérolles, L., Nanostructuration of zrconia under irradiation: a way to enhance the mechanical stability of the zirconia layers. Rev. Adv. Mater. Sci. 10 (2005) 118122
iii Monceau, D., Petot, C., Petot-Ervas, G., Fraser, JW., Graham, MJ., Sproule, I., Surface segregation and morphology of Mg-doped α-alumina powders, J Eur Ceram Soc 15 (1995) 851858
iv Brook, RJ., « The materials science of ceramic interfaces », Surfaces and Interfaces in Ceramic Materials, Kluwer Acad. Press, (1989).
v Guo, X. and Zhang, Z.L., Grain Size Dependent Grain Boundary Defect Structure: Case of Doped Zirconia, Acta Materialia, 51, (2003) 25392547
vi Bernard-Granger, G., Guizard, C., Surblé, S., Baldinozzi, G., Addad, A., Spark plasma sintering of a commercially available granulated zirconia powder—II. Microstructure after sintering and ionic conductivity, Acta Materialia 56 (2008) 46584672
vii Chick, LA., Pederson, L.R., Maupin, G.D., Bates, J.L., Thomas, L.E., Exarhos, G.J., Glycinenitrate combustion synthesis of oxide ceramic powders, Materials Letters 10 (1990) 612.
viii MacDonald, J. R., Impedance Spectroscopy: Emphasizing Solid Materials and Systems, Wiley Inters., New York, 1987.
ix Aoki, M., Chiang, YM., Kosaki, I., Lee, LJ., Tuller, H., Liu, Y. (1996) Solute segregation and grain boundary impedance in high-purity stabilized zirconia. J Am Ceram Soc 79 (1996) 11691180
x Rizea, A., Petot, C., Petot-Ervas, G., Graham, MJ., Sproule, I., Kinetic demixing and grain boundary conductivity of yttria-doped zirconia. Ionics 7 (2001) 7284
xi Petot-Ervas, G., Petot, C., Raulot, JM., Kusinski, J., Sproule, I., Graham, M., Role of the microstructure on the transport properties of Y-doped zirconia and Gd-doped ceria. Ionics 9 (2003) 195201


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