Effect of sintering temperature on the structural properties for CaBi4Ti4O15 compound

Abstract

Polycrystalline CaBi4Ti4O15 (CBT) ceramics were successfully prepared by traditional ceramic technique. The X-ray diffraction spectrum of produced powder was studied at different temperatures (650 C, 850 C, and 1050C. The sintering temperature is very effective factor to obtained high crystallinity with very pure for CBT compound. The product structures analyzed using X-ray diffraction, it confirms, high purity polycrystalline phase formation revealed the existence of bismuth layered perovskite phase Aurivillius orthorhombic crystal structure at 1050ᶹ C. The produced samples' A field emission scanning electron microscope was used to analyze the morphologies (FESEM). It shows crystallites particles in the range about 149-349 nm for the product sintered at1050ᶹ C, it shows a dense microstructure with the presence of large orthorhombic distortion. The dielectric constant and dielectric loss were measured at room temperature as a function of frequency. The dielectric constant of CBT increases in sintering temperature. Moreover, the samples sintered at 1050 ᶹC exhibits good dielectric properties and lower value of tan .

The effect of Barium substitution on the structural and dielectric properties of Pb1-XBaX(Zr0.52Ti0.43(Al0.5Sb0.5)0.05)O3 ceramics at the morphotropic phase boundary

“…To determine this temperature, we sintered our samples with several temperatures between 1170°C to 1270°C with a step of 20°C. Figure 4 represents the variation of the density of different compositions doped by Ba +2 ion as a function of the sintering temperature, the best temperature of sintering is 1220°C which offers the densest samples with a density value of around 7.2 g/cm 3 , this is a very favorable factor for excellent dielectric properties [45]. Figure 5 represents the SEM micrographs of the specimens sintered at 1220°C, it can be seen that the microstructure of the studied samples is dense and composed of grains having different shapes and relatively small sizes.…”

“…Lead zirconate titanate (PZT) materials were exploited in many fields of technology for commercial electronic applications such as sensors, actuators, and memories [1][2][3], due to their high dielectric and piezoelectric capabilities [4][5][6]. The adaptable PZT properties have not yet been adequately replaced; because of those responses occur close to the Morphotropic Phase Boundary (MPB) [7][8][9].…”