Articles
  • Effective synthesis to fabricate a giant dielectric-constant material CaCu3Ti4O12 via solid state reactions
  • Wen Xiang Yuana, Sui Kong Harka,* and Wai Ning Meib
  • a Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong,People's Republic of China b Department of Physics, University of Nebraska at Omaha, Omaha, NE 68182, USA
Abstract
In this study, we effectively synthesized a giant dielectric-constant material CaCu3Ti4O12 (CCTO) by using a solid-state reaction method that was composed of two main chemical reactions. Comparing with typical calcining conditions, our procedures are much less energy- and time-consuming. When preparing our CCTO, we applied a momentarily high temperature heating at the end of the calcination, then followed it by a typical sintering process. We found this additional heating converts the otherwise mixed-phase products into a pure phase and the CCTO samples prepared this special way possess a large dielectric constant, up to 19,000.

Keywords: Solid state reaction, Ceramics, Sintering, Dielectric constant.

This Article

  • 2009; 10(5): 696-699

    Published on Oct 31, 2009