Bulk and grain boundary conductivities as function of temperature and oxygen partial pressure of scandia-stabilized zirconia co-doped with yttria and ceria

W. Preis; A. Egger; J. Waldhäusl; W. Sitte; E. De Carvalho; J. T.S. Irvine

doi:10.1149/1.3205700

Bulk and grain boundary conductivities as function of temperature and oxygen partial pressure of scandia-stabilized zirconia co-doped with yttria and ceria

W. Preis^*, A. Egger, J. Waldhäusl, W. Sitte, E. De Carvalho, J. T.S. Irvine

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

The electrical properties of bulk and grain boundaries of Ce _xY_0.2-xSc_0.6Zr_3.2O _8-δ (0 ≤ × ≤ 0.2) have been investigated as a function of temperature and oxygen partial pressure by application of impedance spectroscopy. All samples have been prepared by means of a sol-gel combustion process. The ionic conductivities of the bulk are in the range from 0.03 to 0.04 S cm^-1 at 700°C in air. In the case of ceria-doped samples a significant decrease of the ionic conductivities of both bulk and grain boundary regions is observed under reducing conditions [p(O₂) < 10 _-15 bar, 700°C] which may be interpreted in terms of association or clustering of oxygen vacancies. In addition, ageing studies have been performed on scandia-stabilized zirconia, doped with 10 mol% Sc ₂O₃ and 1.0 mol% CeO₂, in reducing atmosphere (1%-H₂/Ar) at 700°C by application of a dc four-point technique according to van der Pauw and ac measurements.

Original language	English
Title of host publication	ECS Transactions - Solid Oxide Fuel Cells 11 (SOFC-XI)
Pages	1635-1642
Number of pages	8
Volume	25
Edition	2 PART 2
DOIs	https://doi.org/10.1149/1.3205700
Publication status	Published - 1 Dec 2009
Event	11th International Symposium on Solid Oxide Fuel Cells (SOFC-XI)- 216th ECS Meeting - Vienna, Austria Duration: 4 Oct 2009 → 9 Oct 2009

Conference

Conference	11th International Symposium on Solid Oxide Fuel Cells (SOFC-XI)- 216th ECS Meeting
Country/Territory	Austria
City	Vienna
Period	4/10/09 → 9/10/09

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10.1149/1.3205700

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Preis, W., Egger, A., Waldhäusl, J., Sitte, W., De Carvalho, E., & Irvine, J. T. S. (2009). Bulk and grain boundary conductivities as function of temperature and oxygen partial pressure of scandia-stabilized zirconia co-doped with yttria and ceria. In ECS Transactions - Solid Oxide Fuel Cells 11 (SOFC-XI) (2 PART 2 ed., Vol. 25, pp. 1635-1642) https://doi.org/10.1149/1.3205700

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title = "Bulk and grain boundary conductivities as function of temperature and oxygen partial pressure of scandia-stabilized zirconia co-doped with yttria and ceria",

abstract = "The electrical properties of bulk and grain boundaries of Ce xY0.2-xSc0.6Zr3.2O 8-δ (0 ≤ × ≤ 0.2) have been investigated as a function of temperature and oxygen partial pressure by application of impedance spectroscopy. All samples have been prepared by means of a sol-gel combustion process. The ionic conductivities of the bulk are in the range from 0.03 to 0.04 S cm-1 at 700°C in air. In the case of ceria-doped samples a significant decrease of the ionic conductivities of both bulk and grain boundary regions is observed under reducing conditions [p(O2) < 10 -15 bar, 700°C] which may be interpreted in terms of association or clustering of oxygen vacancies. In addition, ageing studies have been performed on scandia-stabilized zirconia, doped with 10 mol% Sc 2O3 and 1.0 mol% CeO2, in reducing atmosphere (1%-H2/Ar) at 700°C by application of a dc four-point technique according to van der Pauw and ac measurements.",

author = "W. Preis and A. Egger and J. Waldh{\"a}usl and W. Sitte and {De Carvalho}, E. and Irvine, {J. T.S.}",

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Preis, W, Egger, A, Waldhäusl, J, Sitte, W, De Carvalho, E & Irvine, JTS 2009, Bulk and grain boundary conductivities as function of temperature and oxygen partial pressure of scandia-stabilized zirconia co-doped with yttria and ceria. in ECS Transactions - Solid Oxide Fuel Cells 11 (SOFC-XI). 2 PART 2 edn, vol. 25, pp. 1635-1642, 11th International Symposium on Solid Oxide Fuel Cells (SOFC-XI)- 216th ECS Meeting, Vienna, Austria, 4/10/09. https://doi.org/10.1149/1.3205700

Bulk and grain boundary conductivities as function of temperature and oxygen partial pressure of scandia-stabilized zirconia co-doped with yttria and ceria. / Preis, W.; Egger, A.; Waldhäusl, J. et al.
ECS Transactions - Solid Oxide Fuel Cells 11 (SOFC-XI). Vol. 25 2 PART 2. ed. 2009. p. 1635-1642.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

TY - GEN

T1 - Bulk and grain boundary conductivities as function of temperature and oxygen partial pressure of scandia-stabilized zirconia co-doped with yttria and ceria

AU - Preis, W.

AU - Egger, A.

AU - Waldhäusl, J.

AU - Sitte, W.

AU - De Carvalho, E.

AU - Irvine, J. T.S.

PY - 2009/12/1

Y1 - 2009/12/1

N2 - The electrical properties of bulk and grain boundaries of Ce xY0.2-xSc0.6Zr3.2O 8-δ (0 ≤ × ≤ 0.2) have been investigated as a function of temperature and oxygen partial pressure by application of impedance spectroscopy. All samples have been prepared by means of a sol-gel combustion process. The ionic conductivities of the bulk are in the range from 0.03 to 0.04 S cm-1 at 700°C in air. In the case of ceria-doped samples a significant decrease of the ionic conductivities of both bulk and grain boundary regions is observed under reducing conditions [p(O2) < 10 -15 bar, 700°C] which may be interpreted in terms of association or clustering of oxygen vacancies. In addition, ageing studies have been performed on scandia-stabilized zirconia, doped with 10 mol% Sc 2O3 and 1.0 mol% CeO2, in reducing atmosphere (1%-H2/Ar) at 700°C by application of a dc four-point technique according to van der Pauw and ac measurements.

AB - The electrical properties of bulk and grain boundaries of Ce xY0.2-xSc0.6Zr3.2O 8-δ (0 ≤ × ≤ 0.2) have been investigated as a function of temperature and oxygen partial pressure by application of impedance spectroscopy. All samples have been prepared by means of a sol-gel combustion process. The ionic conductivities of the bulk are in the range from 0.03 to 0.04 S cm-1 at 700°C in air. In the case of ceria-doped samples a significant decrease of the ionic conductivities of both bulk and grain boundary regions is observed under reducing conditions [p(O2) < 10 -15 bar, 700°C] which may be interpreted in terms of association or clustering of oxygen vacancies. In addition, ageing studies have been performed on scandia-stabilized zirconia, doped with 10 mol% Sc 2O3 and 1.0 mol% CeO2, in reducing atmosphere (1%-H2/Ar) at 700°C by application of a dc four-point technique according to van der Pauw and ac measurements.

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AN - SCOPUS:77649165933

SN - 9781566777391

VL - 25

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EP - 1642

BT - ECS Transactions - Solid Oxide Fuel Cells 11 (SOFC-XI)

T2 - 11th International Symposium on Solid Oxide Fuel Cells (SOFC-XI)- 216th ECS Meeting

Y2 - 4 October 2009 through 9 October 2009

ER -

Bulk and grain boundary conductivities as function of temperature and oxygen partial pressure of scandia-stabilized zirconia co-doped with yttria and ceria

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