Abstract

REVELO-CASTRO, MARCELA; GAONA-JURADO, SONIA  and  VILLAQUIRAN-RAIGOZA, CLAUDIA FERNANDA. Structural and Microstructural Properties of Systems Based on Bi₀₅Na₀₅TiO₃. Rev.EIA.Esc.Ing.Antioq [online]. 2020, vol.17, n.33, pp.152-159. ISSN 1794-1237.  https://doi.org/10.24050/reia.v17i33.1356.

Perovskites based on bismuth sodium titanates, Bi0 5Na0 5TiO3 (BNT), are incorporated into lead-free piezoelectric materials. Although BNT was discovered five decades ago, many aspects such as the structural complexity and the modifications produced when it is combined with other perovskites are not clearly understood. We studied the structural and microstructural properties of BNT upon addition of BaTiO3 (BT) and SrTiO3 (ST) during sol-gel synthesis. We characterized the ceramic powders by infrared and Raman spectroscopy, X-ray diffraction and scanning electronic microscopy. The addition of BT/ST modified the bonds, generating coexistence and phase transition and confirmed the existence of a morphotropic phase boundary.

Keywords : Sol-gel processes; BNT; Morphotropic Phase Boundary; Spectroscopy; Raman spectroscopy; Rietveld.

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