Dielectric Constant of Ba(Zr_0.05Ti_0.95)O₃ Stabilized by TiO₂ Doping

Abstract

The Dielectric behavior of Ba(Ti_0.95Zr_0.05)O₃ ceramics doped with TiO₂ (from 0.1 to 0.3 mol%) is studied in temperature range from ∼ 30 to 350°C at the frequency of 1 × 10⁴ and 1 × 10⁶ Hz. The addition of 0.1 mol% of TiO₂ to ceramics caused an optimum of dielectric constant at room temperature, while the maximum dielectric constant at Curie temperature was observed at 0.2 mol% TiO₂ doping. The amount of TiO₂ doping less than 0.3 mol% in ceramics can almost stabilize the dielectric constant compared with that of BZT at 1 × 10⁶ Hz. Moreover, an enhancement of Curie temperatures was found at TiO₂ doping from the range of 0.1 to 0.2 mol%.

Keywords:

• Ba(Ti_0.95Zr_0.05)O₃
• dielectric constant
• TiO₂ doping

Acknowledgments

The authors would like to thank Thailand Research Fund (TRF) for supporting by grant fund. This work was also supported by King Mongkut's University of Technology North Bangkok, Thailand. I would also like to thank Prof. Dr. Tawee Tunkasiri for his help in many facilities.