Abstract
Barium stannate (BaSnO3) ceramics were synthesized via the sol–gel process and their dielectric study as a function of sintering temperatures was revealed for the first time. The structural, compositional, and microstructure properties also have been investigated. The crystallinity of the BaSnO3 was analysed by XRD. The morphology of synthesised samples was characterized by FESEM microscopy. Chemical composition and surface composition of prepared samples were identified from XPS and EDAX measurements. The room temperature frequency dependence of relative permittivity (dielectric constant) of barium stannate pellets has been determined over a range of frequencies from 4 Hz to 5 MHz. A high dielectric value ∼ 2476 was obtained at 1 KHz for samples sintered at 900 °C. The dielectric constant (εr) of about 889 was obtained for barium stannate pellets sintered at 1000 °C. The obtained results exhibited an anomalous behaviour in the dielectric response of BaSnO3 ceramics.
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