Structural, optical and conductivity properties in tetragonal BaTi1−xCoxO3 (0≤ x ≤0.1). Issue 25 (30th May 2022)

• Record Type: Journal Article
• Authors: Phong, L. T. H.; Dang, N. T.; Dang, N. V.; Nguyen, Van-Quynh; Manh, D. H.; Nam, P. H.; Nguyen, L. H.; Phong, P. T.
• Is Part Of: RSC advances. Volume 12:Issue 25(2022)
• Page Start: 16119
• Page End: 16130
• Publication Date: 2022-05-30
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/d2ra01411d
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : This work investigates the structure, optical and electrical conductivity properties of BaTi1− x Co x O3 (0≤ x ≤0.1) ceramics prepared by the hydrothermal method. Abstract : This work investigates the structure, optical and electrical conductivity properties of BaTi1− x Co x O3 (0≤ x ≤0.1) ceramics prepared by the hydrothermal method. The X-ray diffraction and Raman scattering analysis demonstrates that the prepared samples have a single-phase tetragonal structure with P 4 mm symmetry. The UV-vis diffuse reflectance spectrum confirms the influence of Co concentration on the direct optical band gap of BaTi1− x Co x O3 ceramics. The optical band gap shifts from 3.14 eV to 3.44 eV as the Co concentration increases from 0 to 0.1. The dielectric constant increases with the depletion of frequency according to the Maxwell–Wagner and Koops model. The AC conductivity versus frequency curve indicates that the conduction mechanism is determined by using the correlated barrier hopping (CBH) model. The Cole–Cole plot of the complex impedance was investigated for the prepared samples. The compounds showed dielectric relaxation of the non-Debye type.