Absence of Dopant Segregation to the Surface of Scandia and Yttria Co-Stabilized Zirconia

Karin Vels Hansen; Mogens Bjerg Mogensen

doi:10.1149/2.003206esl

Absence of Dopant Segregation to the Surface of Scandia and Yttria Co-Stabilized Zirconia

Karin Vels Hansen, Mogens Bjerg Mogensen

Department of Energy Conversion and Storage

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

The surface composition of sintered scandia and yttria co-stabilized zirconia was analyzed with x-ray photoelectron spectroscopy. The samples were sintered at 1300°C or 1500°C in flowing dry or moisturized air. It was found that Sc2O3 does not segregate to the surface, unlike the Y2O3 in yttria stabilized zirconia. The probable reason for this is that due to its size the Sc3+ ion fits better in the zirconia lattice than Y3+ does. The difference in surface composition may be the explanation for the observed increased tolerance toward sulfur of Ni-ScYSZ compared to Ni-YSZ cermets.

Original language	English
Journal	Electrochemical and Solid-State Letters
Volume	15
Issue number	5
Pages (from-to)	B70-B71
ISSN	1099-0062
DOIs	https://doi.org/10.1149/2.003206esl
Publication status	Published - 2012

Keywords

TETRAGONAL ZIRCONIA
Fuel-Cells
Conductivity
FLUORITE
IMPURITY
Oxides
SYSTEM

Access to Document

10.1149/2.003206esl

OpenUrl availability

Full text

Cite this

@article{f3529d9177ff49fc9be73fd8d9168099,

title = "Absence of Dopant Segregation to the Surface of Scandia and Yttria Co-Stabilized Zirconia",

abstract = "The surface composition of sintered scandia and yttria co-stabilized zirconia was analyzed with x-ray photoelectron spectroscopy. The samples were sintered at 1300°C or 1500°C in flowing dry or moisturized air. It was found that Sc2O3 does not segregate to the surface, unlike the Y2O3 in yttria stabilized zirconia. The probable reason for this is that due to its size the Sc3+ ion fits better in the zirconia lattice than Y3+ does. The difference in surface composition may be the explanation for the observed increased tolerance toward sulfur of Ni-ScYSZ compared to Ni-YSZ cermets.",

keywords = "TETRAGONAL ZIRCONIA, Fuel-Cells, Conductivity, FLUORITE, IMPURITY, Oxides, SYSTEM",

author = "{Vels Hansen}, Karin and Mogensen, {Mogens Bjerg}",

year = "2012",

doi = "10.1149/2.003206esl",

language = "English",

volume = "15",

pages = "B70--B71",

journal = "Electrochemical and Solid-State Letters",

issn = "1099-0062",

publisher = "The Electrochemical Society",

number = "5",

}

TY - JOUR

T1 - Absence of Dopant Segregation to the Surface of Scandia and Yttria Co-Stabilized Zirconia

AU - Vels Hansen, Karin

AU - Mogensen, Mogens Bjerg

PY - 2012

Y1 - 2012

N2 - The surface composition of sintered scandia and yttria co-stabilized zirconia was analyzed with x-ray photoelectron spectroscopy. The samples were sintered at 1300°C or 1500°C in flowing dry or moisturized air. It was found that Sc2O3 does not segregate to the surface, unlike the Y2O3 in yttria stabilized zirconia. The probable reason for this is that due to its size the Sc3+ ion fits better in the zirconia lattice than Y3+ does. The difference in surface composition may be the explanation for the observed increased tolerance toward sulfur of Ni-ScYSZ compared to Ni-YSZ cermets.

AB - The surface composition of sintered scandia and yttria co-stabilized zirconia was analyzed with x-ray photoelectron spectroscopy. The samples were sintered at 1300°C or 1500°C in flowing dry or moisturized air. It was found that Sc2O3 does not segregate to the surface, unlike the Y2O3 in yttria stabilized zirconia. The probable reason for this is that due to its size the Sc3+ ion fits better in the zirconia lattice than Y3+ does. The difference in surface composition may be the explanation for the observed increased tolerance toward sulfur of Ni-ScYSZ compared to Ni-YSZ cermets.

KW - TETRAGONAL ZIRCONIA

KW - Fuel-Cells

KW - Conductivity

KW - FLUORITE

KW - IMPURITY

KW - Oxides

KW - SYSTEM

U2 - 10.1149/2.003206esl

DO - 10.1149/2.003206esl

M3 - Journal article

SN - 1099-0062

VL - 15

SP - B70-B71

JO - Electrochemical and Solid-State Letters

JF - Electrochemical and Solid-State Letters

IS - 5

ER -

Absence of Dopant Segregation to the Surface of Scandia and Yttria Co-Stabilized Zirconia

Abstract

Keywords

Access to Document

OpenUrl availability

Fingerprint

Cite this