Humidity sensing effect in Bi25FeO39 sillenite-like compound

• DOI: 10.1007/s10853-016-0310-0
• Publication Date: 2016-08-30T09:50:55Z
• Authors: F. E. N. Ramirez; E. E. Espinosa; Luana S. Pedroza; J. A. Souza
• Keywords: Bismuth; Bismuth ferrite

We have synthesized and characterized structural, morphological, and transport properties of three members of bismuth ferrite family. We have observed a colossal changing in the electrical resistivity of Bi25FeO39 due to humidity adsorption/desorption on the surface of the sample. We suggest that this promising humidity sensing behavior effect is enhanced by the presence of a framework structure that contains electrically polarized Bi3+ cations along with short-range ordered oxygen-vacancies. As a consequence, Bi25FeO39 compound is a real candidate for humidity sensing properties.