CaCu3Ti4O12/CaTiO3 composite dielectrics:: Ba/Pb-free dielectric ceramics with high dielectric constants -: art. no. 032902

被引：107

作者：

Kobayashi, W ^{[1
]}

Terasaki, I ^{[1
]}

机构：

[1] Waseda Univ, Dept Appl Phys, Tokyo 1698555, Japan

来源：

APPLIED PHYSICS LETTERS | 2005年 / 87卷 / 03期

关键词：

D O I：

10.1063/1.1997278

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have measured dielectric properties of Ca1+xCu3-xTi4O12 (x = 0, 0.1, 0.5, 1, 1.5, 2, 2.9 and 3), and have found that Ca2Cu2Ti4O12 (a composite of CaCu3Ti4O12 and CaTiO3) exhibits a high dielectric constant of 1800 with a low dissipation factor of 0.02 below 100 kHz from 220 to 300 K. These are comparable to (or even better than) those of the Pb/Ba-based ceramics, which could be attributed to a barrier layer of CaTiO3 on the surface of the CaCu3Ti4O12 grains. The composite dielectric ceramics reported here are environmentally benign as they do not contain Ba/Pb. (c) 2005 American Institute of Physics.

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