Influence of Eu doping on the structural, electrical and optical behavior of Barium Zirconium Titanate ceramic. Issue 2 (1st February 2018)

• Record Type: Journal Article
• Authors: Bhargavi, G. Nag; Khare, Ayush; Badapanda, Tanmaya; Ray, Priyadarshi K.; Brahme, Nameeta
• Is Part Of: Ceramics international. Volume 44:Issue 2(2018)
• Page Start: 1817
• Page End: 1825
• Publication Date: 2018-02-01
• Subjects: BZT -- X-ray diffraction -- Phase transition -- Dielectric studies -- UV–visible spectra; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2017.10.116
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: The influence of Eu 3+ doping on the structural, dielectric and optical behavior of Barium Zirconium Titanate (BZT) with general formula Ba1−x Eu2x/3 Zr0.05 Ti0.95 O3 (x = 0.00, 0.01, 0.02, 0.03, 0.04, 0.05) has been investigated in the present study. The X-ray diffraction (XRD) data show a phase transition from orthorhombic to tetragonal symmetry due to the incorporation of Eu 3+ ions in BaZr0.05 Ti0.95 O3 matrix. A secondary phase of Eu2 Ti2 O7 is observed for the composition with x ≥ 0.03. The Raman spectroscopic study confirms the structural change as observed in XRD, while the Fourier transformation infra red (FT-IR) spectra reveal that Eu 3+ doping in BZT creates vacancies in the system. The temperature dependent dielectric study shows that the transition temperature and maximum dielectric constant decrease with increase in Eu 3+ content. It is observed that the dielectric diffuseness increases up to x≤0.02 followed by a decrease at higher concentrations of Eu 3+ . The optical behavior of prepared samples is studied through UV–visible spectroscopy, and it is found that the optical band-gap value increases with Eu 3+ concentration up to 2% and then decreases for higher concentrations (x > 2%).