Electrical Conductivity and Stability of Gd-doped Ceria/Y-doped Zirconia Ceramics and Thin Films

Abstract

The interaction between Ce0.90Gd0.10O1.95 (CGO) and Y0.16Zr0.84O1.92 (YSZ) and the electrical conductivity and thermal expansion for solid solutions of CGO and YSZ have been studied. Thin films of CGO interacted with YSZ substrates around 1000 °C, with diffusion of Zr into CGO. The reaction between CGO and YSZ powder started around 1200 °C. The diffusion of Ce into YSZ was the main reaction. The solid solutions of CGOx-YSZ1−x were single phase and possessed a lower conductivity than that of either CGO or YSZ. The electrical conductivity for the solid solutions increased with decreasing oxygen activity, whereas the pO2 independent ionic conductivity region was not observed. The dimensional expansion due to reduction (chemical expansion) was larger for the solid solutions compared to that for of CGO and YSZ.

Department(s)

Materials Science and Engineering

Sponsor(s)

United States. Department of Energy

Keywords and Phrases

Zirconia; Electrical Conductivity; Stability; Thin films; Zirconium oxide

International Standard Serial Number (ISSN)

0167-2738

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2004 Elsevier, All rights reserved.

Publication Date

01 Nov 2004

Link to Full Text

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