Processing of yttrium-doped barium zirconate for high proton conductivity
- Creators
- Babilo, Peter
- Uda, Tetsuya
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Haile, Sossina M.
Abstract
The factors governing the transport properties of yttrium-doped barium zirconate (BYZ) have been explored, with the aim of attaining reproducible proton conductivity in well-densified samples. It was found that a small initial particle size (50–100 nm) and high-temperature sintering (1600 °C) in the presence of excess barium were essential. By this procedure, BaZr0.8Y0.2O3-d with 93% to 99% theoretical density and total (bulk plus grain boundary) conductivity of 7.9 × 10^-3 S/cm at 600 °C [as measured by alternating current (ac) impedance spectroscopy under humidified nitrogen] could be reliably prepared. Samples sintered in the absence of excess barium displayed yttria-like precipitates and a bulk conductivity that was reduced by more than 2 orders of magnitude.
Additional Information
© 2007, Materials Research Society (Received 4 May 2006; accepted 25 January 2007) Funding for this work was provided by the United States Department of Energy through the National Energy Technology Laboratory, Office of Fossil Fuels (DE-FC26-02NT41631). Additional support was provided by the United States National Science Foundation (DMR-0080065) through Caltech's Center for the Science and Engineering of Materials, an NSF Materials Research Science and Engineering Center (MRSEC).Attached Files
Published - BABjmr07.pdf
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Additional details
- Eprint ID
- 8097
- Resolver ID
- CaltechAUTHORS:BABjmr07
- Department of Energy (DOE)
- DE-FC26-02NT41631
- NSF
- DMR-0080065
- Created
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2007-07-30Created from EPrint's datestamp field
- Updated
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2021-11-08Created from EPrint's last_modified field