Study of tungsten oxide effect on the performance of BaTiO3 ceramics

• Published in: Journal of materials science. Materials in electronics Vol. 30; no. 14; pp. 13509 - 13518
• Main Authors: Slimani, Y., Selmi, A., Hannachi, E., Almessiere, M. A., Mumtaz, M., Baykal, A., Ercan, I.
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.07.2019; Springer Nature B.V
• Subjects: Barium titanates; Ceramics; Characterization and Evaluation of Materials; Chemistry and Materials Science; Dielectric properties; Fourier transforms; Materials Science; Microwaves; Morphology; Optical and Electronic Materials; Optical properties; Radio frequency; Reflectance; Spectrophotometry; Tungsten oxides; Ultraviolet reflection; X ray powder diffraction
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-019-01718-x

BaTiO 3 /(WO 3 ) x ceramics (where x = 0, 0.5, 1, 2 and 5 wt%) were prepared by solid state reaction. X-ray powder diffraction, scanning electron microscope, Fourier transform-infrared spectroscopy and ultraviolet–visible diffuse reflectance spectrophotometry were used to investigate the structure, morphology and optical properties, respectively. The electrical and dielectric properties were also performed for different synthesized ceramics. A pure phase was obtained for x = 0.5 wt% ceramic, nevertheless a secondary phase was detected for x ≥ 1 wt% ceramics. The grains size increases for x = 0.5 wt% ceramic and then reduces abruptly with further increasing WO 3 content. The increase of grains size and the absence of impurities were all efficient to enhance the dielectric properties. A suitable WO 3 content leads to obtain ceramics having high dielectric constant and low tangent loss, which is encouraging for radio frequencies and microwaves applications.