Mixed ionic-electronic conductivity in yttria-stabilized zirconia/carbon nanotube composites

被引：13

作者：

Fonseca, F. C. ^{[1
]}

Muccillo, R. ^{[1
]}

de Florio, D. Z. ^{[2
]}

Ladeira, L. O. ^{[3
]}

Ferlauto, A. S. ^{[3
]}

Ladeira, L. O. ^{[3
]}

Ferlauto, A. S. ^{[3
]}

机构：

[1] IPEN, BR-05508 Sao Paulo, SP, Brazil

[2] Univ Fed ABC, BR-09210 Santo Andre, SP, Brazil

[3] Univ Fed Minas Gerais, Dept Fis, BR-31270 Belo Horizonte, MG, Brazil

来源：

APPLIED PHYSICS LETTERS | 2007年 / 91卷 / 24期

关键词：

D O I：

10.1063/1.2821373

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The fabrication of yttria stabilized-zirconia/single-wall carbon nanotube (YSZ/SWCNT) composites is reported. Electrical conductivity measurements from 25 to 800 degrees C revealed that the composites exhibit mixed ionic-electronic conduction. At room temperature, the conductivity increases by 11 orders of magnitude with the addition of SWCNT to the YSZ. At high temperatures (>300 degrees C), the ionic conduction of the YSZ becomes relevant and a mixed ionic-electronic transport is observed. It is found that the transport can be described by a sum of two parallel contributions: thermally activated ionic conduction from the YSZ and fluctuation-assisted tunneling within the SWCNT network. (C) 2007 American Institute of Physics.

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页数：3

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