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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