Preparation and Properties of 0.9Ba(Fe_0.5Ta_0.5)O₃-0.1BiFeO₃ Ceramics

Abstract

In this research, (0.9Ba(Fe_0.5Ta_0.5)O₃-0.1BiFeO₃), (0.9BFT-0.1BFO) ceramics were fabricated via a solid state reaction technique. All ceramic samples exhibited a pure perovskite phase with cubic symmetry, while the calcined powders presented an impurity phase. Microstructures analysis by scanning electron microscopy (SEM) indicated an increase in average grain size with increasing sintering temperature. Examination of dielectric spectroscopy showed that all ceramics had high dielectric constants. An improvement in loss tangent was observed for the 1100°C ceramic. The 1200°C ceramic showed the highest dielectric constants. In addition, all ceramics exhibited non-ferroelectric property.

Keywords:

• Bismuth ferrite
• dielectric properties
• ferroelectric properties

Funding

This work was supported by the Thailand Research Fund (TRF, BRG 5680002), the National Research University Project under Thailand's Office of the Higher Education Commission, The National Research Council of Thailand, 50th CMU anniversary Ph.D. Program Chiang Mai University and Faculty of Science and the Graduate School of Chiang Mai University.