Study of the structural, optical and dielectric properties of the
Ba(0 95)Sm(0 034)Ti((1-x))Zr (x) O(3) solid solution
#MMPMID41384077
Yahakoub EH
; Lemrini K
; Moudrikah T
; Lahrar EH
; Raissi S
; Bendahhou A
; Jalafi I
; Chaou F
; El Barkany S
; Abou-Salama M
RSC Adv
2025[Dec]; 15
(57
): 49269-49287
PMID41384077
show ga
The solid solution Ba(0.95)Sm(0.034)Ti(1-x) Zr (x) O(3), with x = 0.01, 0.05, and
0.10, was synthesized via the solid-state reaction method at 1200 °C for 6 h. The
obtained powders were first characterized by X-ray diffraction (XRD) to confirm
the formation of the expected phase. All samples were found to exhibit a
tetragonal structure with space group P4mm, as determined by Rietveld refinement
of the XRD data. Increasing the zirconium content led to an expansion of the unit
cell volume and a distortion of the [Ti/ZrO(6)] octahedra. Scanning electron
microscopy (SEM) images of pellets sintered at 1300 °C for 6 h showed a denser
microstructure with larger grains in Zr-rich ceramics. A significant modification
of the optical bandgap energy was observed with increasing Zr content. Dielectric
measurements showed that the Curie temperature gradually decreases with
increasing zirconium content. The electrical properties were influenced by the
contributions of grains and grain boundaries. The total electrical resistance (R
(tot) = R (g) + R (gb)) increased with the zirconium content. The analysis of the
complex electrical modulus confirmed a non-Debye behavior for all the ceramics
studied in this work.
free
free
free
