Improving the ionic conductivity of yttria-stabilised zirconia electrolyte materials

Toshiyuki Mori; John Drennan; Jong Heun Lee; Ji Guaang Li; Takayasu Ikegami

doi:10.1016/S0167-2738(02)00508-8

Improving the ionic conductivity of yttria-stabilised zirconia electrolyte materials

Toshiyuki Mori, John Drennan, Jong Heun Lee, Ji Guaang Li, Takayasu Ikegami

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

11 Citations (Scopus)

Abstract

Low-temperature anneals (1200 °C for 40 h) of 8 mol% yttria-stabilised zirconia, prior to the samples being sintered at 1500 °C, had the effect of improving the ionic conductivity of the specimens. The presence of SiO₂ in the specimens was shown to be detrimental, however. Irrespective of the SiO₂ content, this type of heat treatment also leads to improvements in conductivity. Extensive microstructural analysis provided indication of the mechanism of this phenomenon. This included selective formation of zircon, relief of sintering strain leading to the formation of coherent grain boundaries and segregation effects.

Original language	English
Pages (from-to)	529-533
Number of pages	5
Journal	Solid State Ionics
Volume	154-155
DOIs	https://doi.org/10.1016/S0167-2738(02)00508-8
Publication status	Published - 2002 Dec 2
Externally published	Yes

Keywords

Diffuse scatter
Grain boundaries
Ionic conductivity
Yttria-stabilised zirconia

ASJC Scopus subject areas

Chemistry(all)
Materials Science(all)
Condensed Matter Physics

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10.1016/S0167-2738(02)00508-8

Cite this

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title = "Improving the ionic conductivity of yttria-stabilised zirconia electrolyte materials",

abstract = "Low-temperature anneals (1200 °C for 40 h) of 8 mol% yttria-stabilised zirconia, prior to the samples being sintered at 1500 °C, had the effect of improving the ionic conductivity of the specimens. The presence of SiO2 in the specimens was shown to be detrimental, however. Irrespective of the SiO2 content, this type of heat treatment also leads to improvements in conductivity. Extensive microstructural analysis provided indication of the mechanism of this phenomenon. This included selective formation of zircon, relief of sintering strain leading to the formation of coherent grain boundaries and segregation effects.",

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T1 - Improving the ionic conductivity of yttria-stabilised zirconia electrolyte materials

AU - Mori, Toshiyuki

AU - Drennan, John

AU - Lee, Jong Heun

AU - Li, Ji Guaang

AU - Ikegami, Takayasu

PY - 2002/12/2

Y1 - 2002/12/2

N2 - Low-temperature anneals (1200 °C for 40 h) of 8 mol% yttria-stabilised zirconia, prior to the samples being sintered at 1500 °C, had the effect of improving the ionic conductivity of the specimens. The presence of SiO2 in the specimens was shown to be detrimental, however. Irrespective of the SiO2 content, this type of heat treatment also leads to improvements in conductivity. Extensive microstructural analysis provided indication of the mechanism of this phenomenon. This included selective formation of zircon, relief of sintering strain leading to the formation of coherent grain boundaries and segregation effects.

AB - Low-temperature anneals (1200 °C for 40 h) of 8 mol% yttria-stabilised zirconia, prior to the samples being sintered at 1500 °C, had the effect of improving the ionic conductivity of the specimens. The presence of SiO2 in the specimens was shown to be detrimental, however. Irrespective of the SiO2 content, this type of heat treatment also leads to improvements in conductivity. Extensive microstructural analysis provided indication of the mechanism of this phenomenon. This included selective formation of zircon, relief of sintering strain leading to the formation of coherent grain boundaries and segregation effects.

KW - Diffuse scatter

KW - Grain boundaries

KW - Ionic conductivity

KW - Yttria-stabilised zirconia

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VL - 154-155

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EP - 533

JO - Solid State Ionics

JF - Solid State Ionics

ER -

Improving the ionic conductivity of yttria-stabilised zirconia electrolyte materials

Abstract

Keywords

ASJC Scopus subject areas

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