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 (BaTiO 3 , BT) doped with different concentrations strontium (x = 0, 0.05, 0.125, 0.15, 0.20, and 0.3) having the composition Ba 1-x Sr x TiO (barium titanate, BSr T). XRD patterns Rietveld refinement revealed existence single tetragonal phase structure for BSrxT, 0–20%, cubic BSr30%T. The physical properties pure mixtures were studied. results showed that addition to BaTiO 3, including apparent porosity, bulk density, linear shrinkage, water absorption have been changed when increasing content. Moreover, inclusion 15% in increases porosity sample 6.2 28.5%, respectively. optical investigated by Ultraviolet–visible spectroscopy it was found band gap decreases significantly concentration, from 3.10 2.46 eV BSr30%T compound. thermal conductivity measurements doping mechanism increased temperature significant effect on fabricated ceramic materials. Therefore, value at higher temperatures. A correlated behavior optimum values is observed energy, absorption, which can be exploited thermo-optical applications.