Mechanisms of conductivity ceiling in YSZ

The conductivity ceiling phenomena of O 2− ions in stabilized zirconia are studied in terms of the path probability method and Monte Carlo simulation. It is shown that there exist two kinds of possible mechanisms. One of them is due to an order–disorder transition of O 2− ions, which is caused by th...

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Veröffentlicht in:Solid state ionics 2006-10, Vol.177 (19), p.1573-1576
Hauptverfasser: Ishii, Tadao, Ishikawa, Takuma
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container_title Solid state ionics
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creator Ishii, Tadao
Ishikawa, Takuma
description The conductivity ceiling phenomena of O 2− ions in stabilized zirconia are studied in terms of the path probability method and Monte Carlo simulation. It is shown that there exist two kinds of possible mechanisms. One of them is due to an order–disorder transition of O 2− ions, which is caused by the repulsive interaction between O 2− ions, and the other is owing to a percolation transition of dopant cations network. It is proposed that the YSZ case originates in the percolation transition.
doi_str_mv 10.1016/j.ssi.2006.06.004
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subjects Conductivity ceiling
Order–disorder
Percolation transition
YSZ
title Mechanisms of conductivity ceiling in YSZ
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