Electrode and grain-boundary effects on the conductivity of CaCu3Ti4O12 -: art. no. 022907

被引：116

作者：

Zhang, L

机构：

[1] Univ Houston, Ctr Mat Chem, Houston, TX 77204 USA

[2] Univ Houston, Dept Chem, Houston, TX 77204 USA

来源：

APPLIED PHYSICS LETTERS | 2005年 / 87卷 / 02期

关键词：

D O I：

10.1063/1.1993748

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The ac conductivity of CaCu3Ti4O12 (CCTO) ceramics was studied in the temperature range 173 < T < 443 K. The dc conductivities containing the components of electrodes (sigma(e)) and grain boundaries (sigma(gb)) were measured, from which a thermal activation energies of similar to 0.54 eV was inferred. Different behaviors of dielectric relaxations are responsible for the two contributing components. (c) 2005 American Institute of Physics.

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