Two-Step Reactive Aid Sintering of BaZr0.8Y0.2O3-δ Proton-Conducting Ceramics
Abstract
Ceramic-based proton conductors enable high-temperature hydrogen economy applications such as hydrogen separation membranes, fuel cells, and steam electrolyzers. BaZr0.8Y0.2O3-δ (BZY) proton-conducting oxide possesses the highest level of proton conductivity reported to date, but poor sinterability hinders its widespread utilization. Here, we report a two-step reactive aid sintering (TRAS) method involving the introduction of BaCO3 and B2O3-Li2O for the preparation of dense BZY ceramics sintered at 1500°C. The resulting BZY samples showed a pure perovskite structure with a dramatic increase in the relative density to 91.5%. In addition, the shrinkage during sintering was improved to 19.3% by a TRAS method as compared to 2.6% by the conventional solid date reaction method. Moreover, the bulk conductivity was improved due to enhanced densification, while the grain boundary conductivity decreased due to the blocking behavior of the sintering aid resulting in a decrease in the total conductivity of the samples.
- Authors:
-
- Clemson Univ., SC (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Univ. of South Carolina, Columbia, SC (United States)
- Publication Date:
- Research Org.:
- Energy Frontier Research Centers (EFRC) (United States). Heterogeneous Functional Materials Center (HeteroFoaM); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1265849
- Grant/Contract Number:
- AC05-00OR22725; SC0001061
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Electronic Materials
- Additional Journal Information:
- Journal Volume: 44; Journal Issue: 12; Journal ID: ISSN 0361-5235
- Publisher:
- Springer
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; proton conductor; solid oxide fuel cells; sinterability; solid-state reactive sintering; sintering aid
Citation Formats
Wang, Siwei, Chen, Yan, Zhang, Lingling, Ren, Cong, Chen, Fanglin, and Brinkman, Kyle S. Two-Step Reactive Aid Sintering of BaZr0.8Y0.2O3-δ Proton-Conducting Ceramics. United States: N. p., 2015.
Web. doi:10.1007/s11664-015-4078-9.
Wang, Siwei, Chen, Yan, Zhang, Lingling, Ren, Cong, Chen, Fanglin, & Brinkman, Kyle S. Two-Step Reactive Aid Sintering of BaZr0.8Y0.2O3-δ Proton-Conducting Ceramics. United States. https://doi.org/10.1007/s11664-015-4078-9
Wang, Siwei, Chen, Yan, Zhang, Lingling, Ren, Cong, Chen, Fanglin, and Brinkman, Kyle S. Wed .
"Two-Step Reactive Aid Sintering of BaZr0.8Y0.2O3-δ Proton-Conducting Ceramics". United States. https://doi.org/10.1007/s11664-015-4078-9. https://www.osti.gov/servlets/purl/1265849.
@article{osti_1265849,
title = {Two-Step Reactive Aid Sintering of BaZr0.8Y0.2O3-δ Proton-Conducting Ceramics},
author = {Wang, Siwei and Chen, Yan and Zhang, Lingling and Ren, Cong and Chen, Fanglin and Brinkman, Kyle S.},
abstractNote = {Ceramic-based proton conductors enable high-temperature hydrogen economy applications such as hydrogen separation membranes, fuel cells, and steam electrolyzers. BaZr0.8Y0.2O3-δ (BZY) proton-conducting oxide possesses the highest level of proton conductivity reported to date, but poor sinterability hinders its widespread utilization. Here, we report a two-step reactive aid sintering (TRAS) method involving the introduction of BaCO3 and B2O3-Li2O for the preparation of dense BZY ceramics sintered at 1500°C. The resulting BZY samples showed a pure perovskite structure with a dramatic increase in the relative density to 91.5%. In addition, the shrinkage during sintering was improved to 19.3% by a TRAS method as compared to 2.6% by the conventional solid date reaction method. Moreover, the bulk conductivity was improved due to enhanced densification, while the grain boundary conductivity decreased due to the blocking behavior of the sintering aid resulting in a decrease in the total conductivity of the samples.},
doi = {10.1007/s11664-015-4078-9},
journal = {Journal of Electronic Materials},
number = 12,
volume = 44,
place = {United States},
year = {2015},
month = {10}
}
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