Densification behavior of yttria-stabilized zirconia powders for solid oxide fuel cell electrolytes
Abstract 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),...
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| Format: | Article |
| Language: | English |
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Tsinghua University Press
2018-11-01
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| Series: | Journal of Advanced Ceramics |
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| Online Access: | http://link.springer.com/article/10.1007/s40145-018-0282-4 |
| _version_ | 1827851997005479936 |
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| author | Dhruba Panthi Nader Hedayat Yanhai Du |
| author_facet | Dhruba Panthi Nader Hedayat Yanhai Du |
| author_sort | Dhruba Panthi |
| collection | DOAJ |
| description | Abstract 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 °C, respectively. Although YSZ-HT showed a higher sintering rate than TZ-8Y, a sintering temperature of 1350 °C 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 °C. 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. |
| first_indexed | 2024-03-12T10:42:47Z |
| format | Article |
| id | doaj.art-8e05913add65430d8180c9d5e64afb76 |
| institution | Directory Open Access Journal |
| issn | 2226-4108 2227-8508 |
| language | English |
| last_indexed | 2024-03-12T10:42:47Z |
| publishDate | 2018-11-01 |
| publisher | Tsinghua University Press |
| record_format | Article |
| series | Journal of Advanced Ceramics |
| spelling | doaj.art-8e05913add65430d8180c9d5e64afb762023-09-02T08:01:54ZengTsinghua University PressJournal of Advanced Ceramics2226-41082227-85082018-11-017432533510.1007/s40145-018-0282-4Densification behavior of yttria-stabilized zirconia powders for solid oxide fuel cell electrolytesDhruba Panthi0Nader Hedayat1Yanhai Du2College of Aeronautics and Engineering, Kent State UniversityCollege of Aeronautics and Engineering, Kent State UniversityCollege of Aeronautics and Engineering, Kent State UniversityAbstract 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 °C, respectively. Although YSZ-HT showed a higher sintering rate than TZ-8Y, a sintering temperature of 1350 °C 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 °C. 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.http://link.springer.com/article/10.1007/s40145-018-0282-4yttria-stabilized zirconia (YSZ)SOFC electrolytedensificationshrinkageco-sintering |
| spellingShingle | Dhruba Panthi Nader Hedayat Yanhai Du Densification behavior of yttria-stabilized zirconia powders for solid oxide fuel cell electrolytes Journal of Advanced Ceramics yttria-stabilized zirconia (YSZ) SOFC electrolyte densification shrinkage co-sintering |
| title | Densification behavior of yttria-stabilized zirconia powders for solid oxide fuel cell electrolytes |
| title_full | Densification behavior of yttria-stabilized zirconia powders for solid oxide fuel cell electrolytes |
| title_fullStr | Densification behavior of yttria-stabilized zirconia powders for solid oxide fuel cell electrolytes |
| title_full_unstemmed | Densification behavior of yttria-stabilized zirconia powders for solid oxide fuel cell electrolytes |
| title_short | Densification behavior of yttria-stabilized zirconia powders for solid oxide fuel cell electrolytes |
| title_sort | densification behavior of yttria stabilized zirconia powders for solid oxide fuel cell electrolytes |
| topic | yttria-stabilized zirconia (YSZ) SOFC electrolyte densification shrinkage co-sintering |
| url | http://link.springer.com/article/10.1007/s40145-018-0282-4 |
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