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Enhanced sintering of yttrium-doped barium zirconate by addition of ZnO

Babilo, Peter and Haile, Sossina M. (2005) Enhanced sintering of yttrium-doped barium zirconate by addition of ZnO. Journal of the American Ceramic Society, 88 (9). pp. 2362-2368. ISSN 0002-7820. https://resolver.caltech.edu/CaltechAUTHORS:20131125-162530069

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Abstract

The influence of transition metal oxides additives, especially zinc oxide, on the densification and electrical properties of doped barium zirconate have been examined. With the use of zinc oxide as a sintering aid, BaZr_(0.85)V_(0.15)O_(3-δ) was readily sintered to above 93% of theoretical density at 1300 degrees C. Scanning electron microscopic investigations showed Zn accumulation in the intergranular regions. Thermogravimetric analysis of the material under flowing CO_2 showed ZnO-modified barium zirconate to exhibit excellent chemical stability. The conductivity, as measured by A.C. impedance spectroscopy under H_2O saturated nitrogen, was slightly lower than that of unmodified barium zirconate. Electromotive force measurements under fuel cell conditions revealed the total ionic transport number to be ~0.9 at 600 degrees C. The combination of electrical and chemical properties and good sinterabifity render ZnO-modified barium zirconate an excellent candidate for reduced temperature solid oxide fuel cell applications.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1111/j.1551-2916.2005.00449.xDOIArticle
http://onlinelibrary.wiley.com/doi/10.1111/j.1551-2916.2005.00449.x/abstractPublisherArticle
ORCID:
AuthorORCID
Haile, Sossina M.0000-0002-5293-6252
Additional Information:Copyright © 2005 John Wiley & Sons. Manuscript No. 20302. Received July 26, 2004; approved March 14, 2005. Funding for this work was provided by the Department of Energy, Office of Energy Efficiency and Renewable Energy, and by the Army Research Office, Chemical Science Division, through subcontract with NexTech, Inc. Additional support has been provided by the National Science Foundation, through the Caltech Center for the Science and Engineering of Materials. The authors gratefully acknowledge Dr. Ma Chi for his assistance with electron microscopy and chemical analysis.
Funders:
Funding AgencyGrant Number
Department of Energy (DOE)UNSPECIFIED
Army Research Office (ARO)UNSPECIFIED
NexTech, Inc.UNSPECIFIED
NSFUNSPECIFIED
Subject Keywords:PROTON CONDUCTOR BAZR0.9Y0.1O2.95 ELECTROLYTE FUEL-CELLS PEROVSKITE-TYPE OXIDES CHEMICAL-STABILITY CHARGE-CARRIERS BAZRO3 BACEO3 TRANSPORT CERAMICS BATIO3
Issue or Number:9
Record Number:CaltechAUTHORS:20131125-162530069
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20131125-162530069
Official Citation:Babilo, P. and Haile, S. M. (2005), Enhanced Sintering of Yttrium-Doped Barium Zirconate by Addition of ZnO. Journal of the American Ceramic Society, 88: 2362–2368. doi: 10.1111/j.1551-2916.2005.00449.x
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:42702
Collection:CaltechAUTHORS
Deposited By: Jonathan Gross
Deposited On:02 Dec 2013 20:01
Last Modified:03 Oct 2019 06:01

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