Dielectric Behavior of (1−x)Bi(Zn_1/2Ti_1/2)O₃– xBa(Fe_1/2Nb_1/2)O₃Solid Solution Ceramics

Abstract

(1−x)Bi(Zn_1/2Ti_1/2)O₃– xBa(Fe_1/2Nb_1/2)O₃ceramics were prepared by solid-state reaction method where x = 0.7, 0.8 and 0.9. The pure perovskite phase was found to be stable for all compositions. The XRD results demonstrated that the structure of ceramics changed to the cubic phase with increasing BFN content. Dielectric constant of ceramics tended to increase with increasing amounts of BFN and decreased with increasing frequency of measurement. The dielectric loss of the ceramics was lower than 2.0 at room temperature and increased when increasing temperature up to 350°C. Relaxation phenomena of non-Debye type has been observed.

Keywords:

• Lead free ceramic
• perovskite structure
• dielectric constant

Acknowledgments

The authors would like to express their thanks to the Thailand Research Fund (TRF) for financial support and the Scientific and Technological Instruments Center, Mae Fah Luang University for providing important facilities used in this project.