Enhanced optical and thermal conductivity properties of barium titanate ceramic via strontium doping for thermo-optical applications

Abstract

In this study, we prepared a homogeneous fine powder of barium titanate (BaTiO3, BT) doped with different concentrations of strontium (x = 0, 0.05, 0.125, 0.15, 0.20, and 0.3) and having the composition Ba1-xSrxTiO3 (barium strontium titanate, BSrxT). XRD patterns and Rietveld refinement revealed the existence of a single tetragonal phase structure for BSrxT, x = 0–20%, and a single cubic structure for BSr30%T. The physical properties of the pure and doped mixtures were studied. The results showed that the addition of strontium to the physical properties of BaTiO3, including the apparent porosity, bulk density, linear shrinkage, and water absorption have been changed when increasing the Sr content. Moreover, the inclusion of 15% Sr in BaTiO3 increases the apparent porosity and water absorption of the sample to 6.2 and 28.5%, respectively. The optical properties were investigated by Ultraviolet–visible spectroscopy and it was found that the optical band gap decreases significantly with increasing Sr concentration, from 3.10 for pure BaTiO3 to 2.46 eV for the BSr30%T compound. The thermal conductivity measurements showed that the doping mechanism and the increased temperature have a significant effect on the thermal conductivity results of the fabricated ceramic materials. Therefore, it was found that the value of thermal conductivity increases with increasing Sr doping and at higher temperatures. A correlated behavior of optimum values is observed in band gap energy, absorption, and thermal conductivity which can be exploited for thermo-optical applications.

Shielding effectiveness performance of polyaniline-NiFe2O4:Cu composites for sub-8 GHz applications

“…Perovskite ceramic materials are attracting huge interest nowadays due to their fascinating properties, which lead to different optoelectronic applications (Tihtih et al 2021(Tihtih et al , 2023Ibrahim et al 2017Ibrahim et al , 2019Lökçü 2013). One of these applications includes microwave shielding (Pratap et al 2018(Pratap et al , 2021Peymanfar et al 2020aPeymanfar et al , 2021a.…”

Free-standing arrays of BaTiO3 nanotubes for non-enzymatic glucose sensing & hydrophobic coating applications

“…The sensitivity of the BaTiO 3 NTs electrode was estimated to be 44.43 μA mM −1 cm −2 . From figures 6 and 8, it was observed that fabricated BTNTs sensor-based electrode had shown high sensitivity, lesser response time and good linearity compared with other reported ones on BaTiO 3 -based glucose sensors [16].…”

“…Among the metal oxides, nanostructures of BaTiO 3 have been intensively investigated owing to their excellent properties such as large surface to volume ratio, high thermal and chemical stabilities, good biocompatibility, low-cost, lead-free, excellent piezoelectric as well as ferroelectric properties [8][9][10][11]. Due to these, BaTiO 3 nanostructures suitable for many applications such as multilayer ceramic capacitors, nanogenerators, microwave absorbers, thermo optical applications, energy/data storage devices, transducers, resonators, actuators, nonvolatile random-access memory devices, biosensors, hydrophobic coatings, etc [12][13][14][15][16][17][18][19][20][21][22]. However, only a few reports have been reported on glucose sensing and hydrophobic nature of BaTiO 3 nanostructures.…”

Unveiling Temperature-Induced Structural Phase Transition and Luminescence in Mn2+-Doped Cs2NaBiCl6 Double Perovskite

“…For both samples, the phase transition temperature is between 110 and 100 K. Our data show that the Mn 2+ -doping in Cs 2 NaBiCl 6 does not change the phase transition behavior. There are instances in literature where lattice doping of perovskites can significantly change the transition temperature from the tetragonal to cubic phase, but this occurs at a higher (4–7%) doping concentration. , In Mn 2+ -doped Cs 2 NaBiCl 6 , the dopant concentration relevant for Mn 2+ PL is small (0.1–1.3%, see Figure d), and the doping does not significantly alter the phase transition behavior.…”