Dielectric Anomalies of BaTi1-xFexO3 Ceramics for x = 0.0 to 0.6 of Fe Doping Concentration

Effect of Bi³⁺ and Fe³⁺ Ions Substitution on Electrical Response of BaTiO₃ Ceramic

“…In previous works, the effect of Fe substituted BaTiO3 ceramic on the structural evolution from the tetragonal perovskite phase to the hexagonal phase, prepared by the solid route, has been investigated [10,11]. It is concluded by several works [12][13][14] in accordance with our published work [15] that the Fe substitution promotes the formation of the hexagonal phase. Although the BTO ceramic substituted by Fe 3+ ions(BTF) enhance the dielectric properties of this ceramic by reducing of the dielectric constant and displacement of the temperature of the phase transition to the higher temperatures [15,16].…”

Investigation of relaxor and diffuse dielectric phase transitions of Ba1-XBixTi0.8Fe0·2O3 materials

“…Indeed, with increasing of Bi contents, the tetragonal phase becomes predominant at percentage higher than 0.10 of Bi substitution. Thus suggesting that the concentration higher than 0.10 of Bi removes the hexagonal phase formation which is occurred in BT ceramic by Fe 3+ substitution [ 36 ]. According to the refinement, the Bi 3+ and Fe 3+ are incorporated in BaTiO 3 , so there is no secondary phase observed in diffraction patterns.…”

“…It is observed that when Fe substituted at B-site (Ti), it improves the coercive field while at A-site (Ba) substitution, the sample saturation magnetization increases [ 34 ]. Meanwhile, Fe-doped BaTiO 3 ceramics show some inconveniences that limit its application which are the low dielectric permittivity values and high dielectric phase transitions, which were confirmed by several works [ [35] , [36] , [37] ] On the other hand, the co-substitution of BaTiO 3 with Fe 3+ and Bi 3+ ceramics opens new possibilities to improve physical properties which could be compared with BFO-BT composites properties. The effect of BT co-substituted ceramics with Bi 3+ and Fe 3+ on structural, dielectric and ferroelectric properties were recently investigated in our works [ 38 , 39 ].…”

Structural and dielectric properties of Ba0.95Bi0.05Ti1-xFexO3ceramics at x=0.0, 0.1 and 0.2 prepared by solid state method

“…Two dielectric peaks were observed for all the samples. They originated from a tetragonal ferroelectric phase to orthorhombic ferroelectric phase at T T-O then to a cubic paraelectric phase at T O-c 13,14 .As it is indicated inTable 2, the T T-O phase transition shifted to the higher temperature with the increase of Fe substitution for all frequencies due to the increase of hexagonal phase which is known as a ferromagnetic phase15 . While the T O-c shifted to the lower temperature for all the frequencies with arise of Fe content indicating the big effect of Fe doping on dielectric proprieties of Ba 0.95 Bi 0.05 TiO 3 ceramic.…”