Synthesis and characterization of Bi0.5(Na0.8K0.2)0.5TiO3-based ceramics obtained through the sol-gel method. (11th June 2019)

• Record Type: Journal Article
• Authors: Camargo, Javier E.; Parra, Rodrigo; Ramajo, Leandro A.; Castro, Miriam S.
• Is Part Of: Ferroelectrics. Volume 545(2019)
• Page Start: 62
• Page End: 69
• Publication Date: 2019-06-11
• Subjects: Piezoelectric ceramics -- lead-free compositions -- ferroelectric properties -- sintering process -- sol-gel process; Ferroelectricity -- Periodicals; Ferroelectric crystals -- Periodicals; 537
• DOI: 10.1080/00150193.2019.1621712
• Languages: English
• ISSNs: 0015-0193

Abstract

Abstract: The effect of the sintering temperature on the formation of secondary phases and ferroelectric properties of Bi0.5 (Na0.8 K0.2 )0.5 TiO3 ceramics has been studied. Ceramic powders were prepared by the sol-gel method and sintered at different temperatures. Samples were characterized by X-ray diffraction (XRD), Raman microspectroscopy, scanning electron microscopy, impedance spectroscopy and ferroelectric hysteresis loops. Through XRD and Raman results, the perovskite structure was detected, and the formation of secondary phases was registered. As the sintering temperature was increased, the secondary phase composition was modified. Moreover, dielectric properties were influenced by the resulting grain size and the secondary phase amount.