Processing of yttrium-doped barium zirconate for high proton conductivity

Peter Babilo; Tetsuya Uda; Sossina M. Haile

doi:10.1557/jmr.2007.0163

Processing of yttrium-doped barium zirconate for high proton conductivity

Peter Babilo, Tetsuya Uda, Sossina M. Haile^*

^*Corresponding author for this work

Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

362 Scopus citations

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, BaZr_0.8Y_0.2O_3-8 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.

Original language	English (US)
Pages (from-to)	1322-1330
Number of pages	9
Journal	Journal of Materials Research
Volume	22
Issue number	5
DOIs	https://doi.org/10.1557/jmr.2007.0163
State	Published - May 2007

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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title = "Processing of yttrium-doped barium zirconate for high proton conductivity",

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, BaZr0.8Y0.2O3-8 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.",

author = "Peter Babilo and Tetsuya Uda and Haile, {Sossina M.}",

note = "Funding Information: We thank Mr. Jian-Zhen Lin, Ms. Hua-Guo Can and Ms. Li-Mei Feng for collecting the kanzawa spider mites from Fujian (Fuzhou), Jiangxi (Nanchang) and Taiwan (Pingdong), respectively. We are very grateful to Professor Johannes A. J. Breeuwer of the University of Amsterdam, the Netherlands, for his valuable suggestions and corrections of the manuscript. We are also thankful to several anonymous reviewers for suggestions. This study was supported in part by Grant-in-Aid from the National Basic Research Program of China (973 Program, No. 2006CB102001) and Grant-in-Aid for Scientific Research (No. 30370933) from the National Natural Science Foundation of China. This study was also supported in part by Grants-in-Aid for Scientific Research (Nos. 15380040 and 16405022) from the Japan Society for Promotion of Science.",

year = "2007",

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doi = "10.1557/jmr.2007.0163",

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N2 - 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, BaZr0.8Y0.2O3-8 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.

AB - 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, BaZr0.8Y0.2O3-8 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.

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Processing of yttrium-doped barium zirconate for high proton conductivity

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