Structural, optical, and dielectric study of hydrothermally synthesized barium-doped PbTiO3 (0 ≤ x ≤ 0.9) perovskite materials

• Published in: Applied physics. A, Materials science & processing Materials science & processing, 2023-12, Vol.129 (12), Article 858
• Main Authors: Sakout, Y., Ghadraoui, O. El, Lahrar, E. H., Zouhairi, M., Tijani, N., Harrach, A., Lamcharfi, T., Haddad, M., Zouihri, H.
• Format: Article
• Language: English
• Subjects: Applied physics; Barium; Ceramics; Characterization and Evaluation of Materials; Condensed Matter Physics; Crystal defects; Crystal lattices; Crystal structure; Cubic lattice; Doping; Electrical properties; Energy gap; Energy value; Hydrothermal crystal growth; Lattice parameters; Lattice vibration; Lead titanates; Machines; Manufacturing; Materials science; Nanotechnology; Optical and Electronic Materials; Optical properties; Parameter modification; Perovskites; Physics; Physics and Astronomy; Processes; Raman spectroscopy; Spectrum analysis; Surfaces and Interfaces; Synthesis; Thin Films
• ISSN: 0947-8396; 1432-0630
• DOI: 10.1007/s00339-023-07130-x

This paper presents a comprehensive study on the synthesis, characterization, and analysis of the structural, optical, dielectric, and electrical properties of barium-doped lead titanate PbTiO 3 (PT) ceramics. The hydrothermal synthesis method was employed to fabricate the Ba-doped PbTiO 3 ceramics, followed by sintering at 1000 °C for 4 h. X-ray diffraction analysis reveals a transition from a tetragonal to pseudo-cubic crystal structure with increasing barium concentration, accompanied by changes in lattice parameters. Raman spectroscopy confirms characteristic phonon modes of the tetragonal phase, with broadening and intensity changes indicating the presence of defects induced by barium doping. UV–Vis–NIR spectroscopy shows increased absorption in the ultraviolet region, suggesting modified optical properties. The band gap energy values also increase with barium content. Dielectric measurements demonstrate the impact of barium doping on the dielectric behavior, with higher dielectric constants observed for higher barium concentrations. The modified Uchino plots reveal parameters γ and δ, providing insights into the electrical properties and dielectric response. Overall, this study highlights the structural modifications, optical changes, and dielectric behavior induced by barium doping in PbTiO 3 ceramics.