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Research Article | Open Access

Densification behavior of yttria-stabilized zirconia powders for solid oxide fuel cell electrolytes

Dhruba PANTHIa,bNader HEDAYATaYanhai DUa( )
College of Aeronautics and Engineering, Kent State University, 1400 Lefton Esplanade, Kent, Ohio 44242, USA
Department of Engineering Technology, Kent State University at Tuscarawas, 330 University Dr NE, New Philadelphia, Ohio 44663, USA
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Yttria-stabilized zirconia (YSZ) is the most common electrolyte material for solid oxide fuel cells. Herein, we conducted a comparative study on the densification behavior of three different kinds of commercial 8 mol% YSZ powders: (i) TZ-8Y (Tosoh, Japan), (ii) MELox 8Y (MEL Chemicals, UK), and (iii) YSZ-HT (Huatsing Power, China). The comparison was made on both the self- supporting pellets and thin-film electrolytes coated onto a NiO–YSZ anode support. For the pellets, MELox 8Y showed the highest densification at lower sintering temperatures with 93% and 96% of the theoretical density at 1250 and 1300 ℃, respectively. Although YSZ-HT showed a higher sintering rate than TZ-8Y, a sintering temperature of 1350 ℃ was required for both the powders to reach 95% of the theoretical density. For the thin-film electrolytes, on the other hand, YSZ-HT showed the highest sintering rate with a dense microstructure at a co-sintering temperature of 1250 ℃. Our results indicate that besides the average particle size, other factors such as particle size distribution and post-processing play a significant role in determining the sintering rate and densification behavior of the YSZ powders. Additionally, a close match in the sintering shrinkage of the electrolyte and anode support is important for facilitating the densification of the thin-film electrolytes.


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Journal of Advanced Ceramics
Pages 325-335
Cite this article:
PANTHI D, HEDAYAT N, DU Y. Densification behavior of yttria-stabilized zirconia powders for solid oxide fuel cell electrolytes. Journal of Advanced Ceramics, 2018, 7(4): 325-335.








Web of Science






Received: 25 December 2017
Revised: 29 April 2018
Accepted: 09 May 2018
Published: 21 November 2018
© The author(s) 2018

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