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Scandia – Stabilized Zirconia: Effect of Dopants on Surface/Grain Boundary Segregation and Transport Properties

Published online by Cambridge University Press:  26 February 2011

A. Smirnova
Affiliation:
alevtina@engr.uconn.edu, UCONN, Chemistry, Materials, and Biomolecular Engineering, Storrs CT 06269, United States
V. Sadykov
Affiliation:
sadykov@catalysis.ru, Boreskov Institute of Catalysis, Novosibirsk, 630090, Russian Federation
V. Muzykantov
Affiliation:
muzykantov@catalysis.ru, Boreskov Institute of Catalysis, 5 Pr. Ak. Lavrent'eva, Novosibirsk, 630090, Russian Federation
N. Mezentseva
Affiliation:
mnv@catalysis.ru, Boreskov Institute of Catalysis, 5 Pr. Ak. Lavrent'eva, Novosibirsk, 630090, Russian Federation
V. Ivanov
Affiliation:
vpivanov@catalysis.ru, Boreskov Institute of Catalysis, 5 Pr. Ak. Lavrent'eva, Novosibirsk, 630090, Russian Federation
V. Zaikovskii
Affiliation:
viz@catalysis.ru, Boreskov Institute of Catalysis, 5 Pr. Ak. Lavrent'eva, Novosibirsk, 630090, Russian Federation
A. Ishchenko
Affiliation:
viz@catalysis.ru, Boreskov Institute of Catalysis, 5 Pr. Ak. Lavrent'eva, Novosibirsk, 630090, Russian Federation
N. Sammes
Affiliation:
sammes@engr.uconn.edu, UCONN, Mechanical Engineering, Storrs, CT, 06269, United States
O. Vasylyev
Affiliation:
vasilev@ipms.kiev.ua, Institute for problems of Materials Science, Department of Physics of Strength and Plasticity, Kyiv, 03680, Ukraine
J. Kilner
Affiliation:
j.kilner@imperial.ac.uk, Imperial College, Department of Materials, London, SW72AZ, United Kingdom
J. Irvine
Affiliation:
jtsi@st-and.ac.uk, University of St. Andrews, School of Chemistry, Fife, KY169ST, United Kingdom
V. Vereschak
Affiliation:
vereschak@bigmir.net, Ukrainian State Chemical Technology University, Dnepropetrovsk, 49005, Ukraine
I. Kosacki
Affiliation:
Igor.Kosacki@shell.com, Shell, Houston, TX, 77002, United States
N. Uvarov
Affiliation:
uvarov@solid.nsc.ru, Institute of Solid State Chemistry and Mechanochemistry SB RAS, Novosibirsk, 630090, Russian Federation
V. Zyryanov
Affiliation:
vladi@mail.nsk.ru, Institute of Solid State Chemistry and Mechanochemistry SB RAS, Novosibirsk, 630090, Russian Federation
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Abstract

The nanocrystalline samples of 10wt.%Scandia stabilized Zirconia (10ScSZ) and 1wt.%Ceria doped ScSZ (1Ce10ScSZ) prepared via co-precipitation route were characterized and compared to commercially available samples regarding their transport properties and electrical conductivity. The results of oxygen isotope experiments show that for Zirconia-based electrolytes, the rate of heteroexchange is lower than that for Samaria-doped Ceria. The results of Secondary Ions Mass Spectrometry (SIMS) indicate that all admixed components are present both in the surface layer and the bulk of the studied samples with pronounced segregation on the grain boundary. The highest total conductivity is observed for DKKK sample. In the range of 600-400°C the highest conductivity observed for synthesized nanocrystalline 1Ce10ScSZ sample is explained by the effect of segregated Scandia doped Ceria surface layers.

Type
Research Article
Copyright
Copyright © Materials Research Society 2007

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Scandia – Stabilized Zirconia: Effect of Dopants on Surface/Grain Boundary Segregation and Transport Properties
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