Influence of SFT Content on Physical, Mechanical and Dielectric Properties of BNKT-SFT Binary Ceramic System

Abstract

Abstract In this research, the binary solid solution Bi0.5(Na0.84K0.16)0.5TiO3 and Sr(Fe0.5Ta0.5)O3 in the system of (1-x)BNKT-xSFT was synthesized by solid-state reaction technique. The mixed powder and ceramics of (1-x)BNKT-xSFT where x=0.00, 0.01, 0.02, 0.03 and 0.04 were calcined at 900 °C for 2 h and sintered at 1125 °C for 2 h. The sintered ceramic samples were investigated phase formation, densification, mechanical properties, and dielectric constant at room temperature. The XRD analysis of all condition samples shows a pure phase perovskite structure. The maximum of bulk density, HV, HK microhardness, the elastic modulus, fracture toughness, and dielectric constant were found at x= 0.04 condition which the value is 5.877 g/cm3, 6.21 GPa, 5.39 GPa, 181.12 GPa, 0.19 MPa·m1/2 and 1,404, respectively. A small among SFT content shows an improvement of densification, mechanical properties, and dielectric constant in (1-x)BNKT-xSFT ceramics. The relations of these results were discussed and compared to the previously reported.