Synthesis and characterization of Ba0.5Sr0.5TiO3 nanoparticles

Photoluminescence activity of Ba1−xCaxTiO3: dependence on particle size and morphology

“…A broadband in the region of 600 cm À1 corresponded to the symmetric and asymmetric stretching of the Ti-O octahedron within [TiO 6 ], featuring its distortion. 24 We observed a broadening and slight shi of this band to higher wavelengths, indicating that the stretching of Ti-O of BaTiO 3 (x ¼ 0) leads to the corresponding mode, CaTiO 3 (x ¼ 1). 23 According to Jin et al, 25 this shi may be due to the weak Coulomb interactions.…”

“…The bands that appeared around 1350 to 3500 cm À1 correspond to the OH À groups and water molecules of hydration (adsorbed onto the particle surface), respectively, common in systems that have hydrogen bonding. 14,24 According to Patil et al, 29 the band at 3500 cm À1 may also indicate defects caused by OH À groups in the titanate lattice.…”

Enhanced Dielectric Properties of Ba0.5Sr0.5TiO3/MgO Composites Prepared by Coprecipitation Derived Core–Shell Powders

“…Figure gives FT‐IR spectra of the BST/MgO and OAM‐BST/MgO composites, in which the large band centered at 558 cm −1 is the characteristic absorption of Ti–O bonds in BST, while the band at 1450 cm −1 is due to the Mg–O stretching vibration in MgO . Moreover, the weak band at 860 cm −1 reveals minimal Ba 1− x Sr x CO 3 traces, which becomes weak after modification by OA. Comparing with the IR curve of the BST/MgO composite, the new weak bands at 2845 and 2924 cm −1 are attributed to the symmetric and asymmetric C–H vibration of the methylene group from the oleic acid molecules .…”

Morphology and Properties of (Ba, Sr, Ca) Titanates Synthesized by Microwave-Assisted Hydrothermal Method

“…Partial substitution of A atoms in titanium compounds, where the other cation is isovalent, modifies the dielectric properties and ferroelectric transition, and also significantly increases the transition phase [2]. Among the perovskite compounds, Ba 1-x Ca x TiO 3 (BCT), Ba x Sr 1-x TiO 3 (BST) and Ca x Sr 1-x TiO 3 (CST) often draw attention due to their interesting ferroelectric, pyroelectric, and piezoelectric properties and high dielectric constant, along with good thermal stability [3][4][5]. Several techniques have been used in the preparation of these types of titanates.…”