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

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. Here, in this work, 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. Finally, 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.

Authors:
ORCiD logo [1]; ORCiD logo [2];  [3];  [4]; ORCiD logo [5]
  1. Northwestern Univ., Evanston, IL (United States). Department of Materials Science and Engineering, Robert R. McCormick School of Engineering and Applied Science
  2. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
  3. NASA Glenn Research Center, Cleveland, OH (United States); Univ. of Toledo, OH (United States). Department of Mechanical, Industrial and Manufacturing Engineering
  4. NASA Glenn Research Center, Cleveland, OH (United States)
  5. Northwestern Univ., Evanston, IL (United States). Department of Materials Science and Engineering, Robert R. McCormick School of Engineering and Applied Science; California Inst. of Technology (CalTech), Pasadena, CA (United States). Division of Engineering and Applied Science
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Aeronautic and Space Administration (NASA) - Office of the Chief Technologist
OSTI Identifier:
1481417
Alternate Identifier(s):
OSTI ID: 1389888
Grant/Contract Number:  
AC02-06CH11357; (NSF DMR-1121262)
Resource Type:
Accepted Manuscript
Journal Name:
International Journal of Applied Ceramic Technology
Additional Journal Information:
Journal Volume: 15; Journal Issue: 2; Journal ID: ISSN 1546-542X
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Porous materials; processing; X-ray computed tomography; zirconia: yttria stabilized

Citation Formats

Miller, Sarah M., Xiao, Xianghui, Setlock, John A., Farmer, Serene C., and Faber, Katherine. Freeze-cast yttria-stabilized zirconia pore networks: Effects of alcohol additives. United States: N. p., 2017. Web. doi:10.1111/ijac.12794.
Miller, Sarah M., Xiao, Xianghui, Setlock, John A., Farmer, Serene C., & Faber, Katherine. Freeze-cast yttria-stabilized zirconia pore networks: Effects of alcohol additives. United States. doi:10.1111/ijac.12794.
Miller, Sarah M., Xiao, Xianghui, Setlock, John A., Farmer, Serene C., and Faber, Katherine. Thu . "Freeze-cast yttria-stabilized zirconia pore networks: Effects of alcohol additives". United States. doi:10.1111/ijac.12794. https://www.osti.gov/servlets/purl/1481417.
@article{osti_1481417,
title = {Freeze-cast yttria-stabilized zirconia pore networks: Effects of alcohol additives},
author = {Miller, Sarah M. and Xiao, Xianghui and Setlock, John A. and Farmer, Serene C. and Faber, Katherine},
abstractNote = {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. Here, in this work, 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. Finally, 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.},
doi = {10.1111/ijac.12794},
journal = {International Journal of Applied Ceramic Technology},
number = 2,
volume = 15,
place = {United States},
year = {2017},
month = {8}
}

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    Works referencing / citing this record:

    Tubular solid oxide fuel cells fabricated by a novel freeze casting method
    journal, September 2019

    • Panthi, Dhruba; Hedayat, Nader; Woodson, Theo
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