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Structural and microstructural properties of systems based on Bi0.5Na0.5TiO3

Published 2020-03-08
Articles

Abstract

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. 

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Authors

  • Marcela Revelo Castro

    Universidad del Cauca

  • Sonia Gaona Jurado

    Universidad del Cauca

  • Claudia Fernanda Villaquiran Raigoza

    Universidad del Cauca

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