Synthesis and Properties of 0.8PZT-0.10PZN-0.10PNN Ceramics

Abstract

The 0.8PZT-0.10PZN-0.10PNN powders were synthesized via a columbite method. Pure perovskite phase was obtained at the calcinations temperature ≥ 900°C. Ceramics with the same composition were fabricated at various sintering temperatures. The densest ceramic with pure phase perovskite was obtained at the sintering temperature of 1250^oC for 4 h. The ceramics showed two phase transition at ∼265°C and ∼291°C which correspond to orthorhombic to tetragonal and tetragonal to cubic phase transition, respectively. The obtained ceramics also showed a very high dielectric constant >40000. The ferroelectric properties were investigated and discussed.

Keywords:

• Dielectric properties
• ferroelectric properties
• columbite synthesis

Acknowledgments

This work was supported by the Royal Golden Jubilee Ph.D. Program, The Thailand Research Fund (TRF), Faculty of Science and Graduate School Chiang Mai University, and Office of Higher Education Commission, Thailand (OHEC).