D. W. Johnson—contributing editor
Enhancement of Giant Dielectric Response in CaCu3Ti4O12 Ceramics by Zn Substitution
Article first published online: 29 OCT 2009
© 2009 The American Ceramic Society
Journal of the American Ceramic Society
Volume 93, Issue 1, pages 184–189, January 2010
How to Cite
Ni, L. and Chen, X. M. (2010), Enhancement of Giant Dielectric Response in CaCu3Ti4O12 Ceramics by Zn Substitution. Journal of the American Ceramic Society, 93: 184–189. doi: 10.1111/j.1551-2916.2009.03384.x
The present work was supported by National Science Foundation of China under grant no. 50832005 and 50672083, and National Basic Research Program of China under grant no. 2009CB929503.
- Issue published online: 21 DEC 2009
- Article first published online: 29 OCT 2009
- Manuscript No. 25551. Received November 26, 2008; approved August 19, 2009.
Zn-substituted CaCu3Ti4O12 ceramics were synthesized by solid-state sintering. Their microstructures and dielectric properties were investigated. Ca(Cu1−xZnx)3Ti4O12 single-phase structures were obtained up to x=0.1, and the Cu+/Cu2+ and Ti3+/Ti4+ mixed-valent structure was enhanced with increasing Zn substitution. The giant dielectric response was significantly enhanced by Zn substitution. The dielectric constant increased with increasing x, and a giant dielectric constant plateau as high as ∼9 × 104 was achieved for x=0.1 at 10 kHz, while that for x=0 was ∼3 × 104. The enhanced giant dielectric response was profoundly concerned with the modified mixed-valent structure.