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Journal article

Strontium zirconate as silicon and aluminum scavenger in yttria stabilized zirconia

By Andersen, Thomas1,2; Hansen, Karin Vels3,4,5; Chorkendorff, Ib1,2; Mogensen, Mogens Bjerg4,5,6

From

Surface Physics and Catalysis, Department of Physics, Technical University of Denmark1

Department of Physics, Technical University of Denmark2

Microstructures and Interfaces, Fuel Cells and Solid State Chemistry Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark3

Fuel Cells and Solid State Chemistry Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark4

Risø National Laboratory for Sustainable Energy, Technical University of Denmark5

Electrochemistry, Fuel Cells and Solid State Chemistry Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark6

Here we report on strontium zirconate as a getter for silicon dioxide and aluminum oxide in yttria stabilized zirconia (YSZ) single crystals for cleaning purposes. YSZ single crystals were covered with strontium zirconate powder and heat treated at 1450°C in water vapor. After treatment the YSZ single crystals showed homogeneously distributed ball-sectioned features (bumps) across the external surface of the crystal.

The composition as quantified by energy-dispersive X-ray spectroscopy (EDS) showed a large enrichment of silicon and aluminum in the bumps. From cross-section analysis by transmission electron microscopy (TEM) the interface region between bump and YSZ single crystal bulk was examined. EDS showed a homogeneous distribution of silicon and aluminum through the cross section of a bump.

The results suggest strontium zirconate as a good getter for silicon and aluminum from bulk materials at elevated temperatures and prove a route to remove trace bulk impurities in YSZ.

Language: English
Year: 2011
Pages: 82-87
ISSN: 18727689 and 01672738
Types: Journal article
DOI: 10.1016/j.ssi.2011.02.025
ORCIDs: Hansen, Karin Vels , Chorkendorff, Ib and Mogensen, Mogens Bjerg
Keywords

Solid Oxide Fuel Cells

Other keywords

Cleaning Impurities Strontium zirconate Yttria stabilized zirconia

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