Abstract
The effect of SrO in improving the grain-boundary conduction in gadolinia-doped ceria (GDC) was examined by measuring the spatially resolved local impedance of a SrO-in-diffused GDC specimen containing 500 ppm of Si O2. The addition of SrO increased the grain-boundary conduction by up to ∼120 times, indicating that SrO effectively mitigates the highly resistive intergranular phase. This paper discusses the possible reasons in terms of the grain-boundary structure, the incorporation of SrO into the GDC lattice, the formation of a second phase, and a scavenging reaction.
Original language | English |
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Pages (from-to) | 91-95 |
Number of pages | 5 |
Journal | Electrochemical and Solid-State Letters |
Volume | 10 |
Issue number | 5 |
DOIs | |
Publication status | Published - 2007 Jan 1 |
ASJC Scopus subject areas
- General Chemical Engineering
- General Materials Science
- Physical and Theoretical Chemistry
- Electrochemistry
- Electrical and Electronic Engineering