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Freeze-cast yttria-stabilized zirconia pore networks: Effects of alcohol additives

Miller, Sarah and Xiao, Xianghui and Setlock, John and Farmer, Serene and Faber, Katherine (2018) Freeze-cast yttria-stabilized zirconia pore networks: Effects of alcohol additives. International Journal of Applied Ceramic Technology, 15 (2). pp. 296-306. ISSN 1546-542X. http://resolver.caltech.edu/CaltechAUTHORS:20170825-143142523

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Abstract

Freeze casting yttria-stabilized zirconia (YSZ) can be useful in making electrodes for solid oxide fuel cells (SOFCs) by introducing hierarchical porosity to increase triple-phase boundary (TPB) area while maintaining adequate fuel flow. In this study the influence of alcohol additives on pore structure of aqueous YSZ freeze-cast samples was investigated. Slurries with ethanol, iso-propyl alcohol, or methanol as additives were compared to a control sample. Pore characteristics along sample lengths were measured using X-ray computed tomography reconstructions. The control sample showed significant changes in pore size along sample length, whereas pore size of the alcohol additive samples remained similar, indicating that freezing rates of the additive samples remained constant during solidification. Ice lens formation and interactions between alcohols and slurry functional additives (dispersant, surfactant, and binder) resulted in complex pore structures which show promise in increasing SOFC TPB area.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1111/ijac.12794DOIArticle
ORCID:
AuthorORCID
Miller, Sarah0000-0001-8462-1063
Xiao, Xianghui0000-0002-7142-3452
Faber, Katherine0000-0001-6585-2536
Alternate Title:Freeze-Cast YSZ Pore Networks: Effects of Alcohol Additives
Additional Information:© 2017 The American Ceramic Society. Issue online: 9 February 2018; Version of record online: 13 September 2017; Accepted manuscript online: 24 August 2017; Manuscript Accepted: 12 August 2017; Manuscript Received: 6 June 2017. Special Topic: Ceramics for Solid Oxide Fuel Cells. This work was supported by a U.S. National Aeronautics and Space Administration (NASA) Space Technology Research Fellowship and used resources of the Advanced Photon Source, a U.S. Department of Energy (DOE) Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under Contract No. DE-AC02-06CH11357. This work also made use of the OMM Facility which receives support from the MRSEC Program (NSF DMR-1121262) of the Materials Research Center at Northwestern University and the EPIC facility (NUANCE Center-Northwestern University), which has received support from the MRSEC program (NSF DMR-1121262) at the Materials Research Center; the International Institute for Nanotechnology (IIN); and the State of Illinois, through the IIN.
Funders:
Funding AgencyGrant Number
NASAUNSPECIFIED
Department of Energy (DOE)DE-AC02-06CH11357
NSFDMR-1121262
Northwestern UniversityUNSPECIFIED
State of IllinoisUNSPECIFIED
Subject Keywords:porous materials; processing; X-ray computed tomography; zirconia: yttria stabilized
Record Number:CaltechAUTHORS:20170825-143142523
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20170825-143142523
Official Citation:Miller S, Xiao X, Setlock J, Farmer S, Faber K. Freeze-cast yttria-stabilized zirconia pore networks: Effects of alcohol additives. Int J Appl Ceram Technol. 2018;15:296-306. https://doi.org/10.1111/ijac.12794
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:80803
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:28 Aug 2017 19:05
Last Modified:17 May 2018 17:36

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