Effect of zinc oxide doping on the grain boundary conductivity of Ce 0.8Ln0.2O1.9 ceramics (Ln = Y, Sm, Gd)

Lin Ge; Shujun Li; Yifeng Zheng; Ming Zhou; Han Chen; Lucun Guo

doi:10.1016/j.jpowsour.2011.03.032

Effect of zinc oxide doping on the grain boundary conductivity of Ce _0.8Ln_0.2O_1.9 ceramics (Ln = Y, Sm, Gd)

Lin Ge, Shujun Li, Yifeng Zheng, Ming Zhou, Han Chen, Lucun Guo

College of Materials Science and Engineering

Nanjing Tech University

Research output: Contribution to journal › Article › peer-review

31 Scopus citations

Abstract

The effect of zinc oxide (ZnO) doping on the densification behaviours and the electrical properties of Ce_0.8Ln_0.2O_1.9 (Ln = Y, Sm, Gd) ceramics are examined. The addition of ZnO (1 mol%) reduces the sintering temperature by ∼200 °C and improves the grain boundary behaviours significantly. Both the apparent grain boundary conductivity (σgbapp) and the specific grain boundary conductivity (σgbsp) are investigated. Under the same synthetic conditions, ZnO doping leads to a larger grain size and a higher σgbsp. The SEM and EDS results indicate that ZnO-doping can induce Si enrichment on the surfaces of samples (i.e. reducing the content of Si at grain boundaries), which may explain the improvements occurs in the grain boundary conductions.

Original language	English
Pages (from-to)	6131-6137
Number of pages	7
Journal	Journal of Power Sources
Volume	196
Issue number	15
DOIs	https://doi.org/10.1016/j.jpowsour.2011.03.032
State	Published - 1 Aug 2011

Keywords

Doped ceria
Grain-boundary conduction
Sintering aid
Solid oxide fuel cell
Zinc oxide

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This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.jpowsour.2011.03.032

Cite this

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title = "Effect of zinc oxide doping on the grain boundary conductivity of Ce 0.8Ln0.2O1.9 ceramics (Ln = Y, Sm, Gd)",

abstract = "The effect of zinc oxide (ZnO) doping on the densification behaviours and the electrical properties of Ce0.8Ln0.2O1.9 (Ln = Y, Sm, Gd) ceramics are examined. The addition of ZnO (1 mol%) reduces the sintering temperature by ∼200 °C and improves the grain boundary behaviours significantly. Both the apparent grain boundary conductivity (σgbapp) and the specific grain boundary conductivity (σgbsp) are investigated. Under the same synthetic conditions, ZnO doping leads to a larger grain size and a higher σgbsp. The SEM and EDS results indicate that ZnO-doping can induce Si enrichment on the surfaces of samples (i.e. reducing the content of Si at grain boundaries), which may explain the improvements occurs in the grain boundary conductions.",

keywords = "Doped ceria, Grain-boundary conduction, Sintering aid, Solid oxide fuel cell, Zinc oxide",

author = "Lin Ge and Shujun Li and Yifeng Zheng and Ming Zhou and Han Chen and Lucun Guo",

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T1 - Effect of zinc oxide doping on the grain boundary conductivity of Ce 0.8Ln0.2O1.9 ceramics (Ln = Y, Sm, Gd)

AU - Ge, Lin

AU - Li, Shujun

AU - Zheng, Yifeng

AU - Zhou, Ming

AU - Chen, Han

AU - Guo, Lucun

PY - 2011/8/1

Y1 - 2011/8/1

N2 - The effect of zinc oxide (ZnO) doping on the densification behaviours and the electrical properties of Ce0.8Ln0.2O1.9 (Ln = Y, Sm, Gd) ceramics are examined. The addition of ZnO (1 mol%) reduces the sintering temperature by ∼200 °C and improves the grain boundary behaviours significantly. Both the apparent grain boundary conductivity (σgbapp) and the specific grain boundary conductivity (σgbsp) are investigated. Under the same synthetic conditions, ZnO doping leads to a larger grain size and a higher σgbsp. The SEM and EDS results indicate that ZnO-doping can induce Si enrichment on the surfaces of samples (i.e. reducing the content of Si at grain boundaries), which may explain the improvements occurs in the grain boundary conductions.

AB - The effect of zinc oxide (ZnO) doping on the densification behaviours and the electrical properties of Ce0.8Ln0.2O1.9 (Ln = Y, Sm, Gd) ceramics are examined. The addition of ZnO (1 mol%) reduces the sintering temperature by ∼200 °C and improves the grain boundary behaviours significantly. Both the apparent grain boundary conductivity (σgbapp) and the specific grain boundary conductivity (σgbsp) are investigated. Under the same synthetic conditions, ZnO doping leads to a larger grain size and a higher σgbsp. The SEM and EDS results indicate that ZnO-doping can induce Si enrichment on the surfaces of samples (i.e. reducing the content of Si at grain boundaries), which may explain the improvements occurs in the grain boundary conductions.

KW - Doped ceria

KW - Grain-boundary conduction

KW - Sintering aid

KW - Solid oxide fuel cell

KW - Zinc oxide

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