Artículos de revistas
Magnetic Properties of Liquid-Phase Sintered CoFe2O4 for Application in Magnetoelastic and Magnetoelectric Transducers
Fecha
2012Registro en:
SENSORS, BASEL, v. 12, n. 8, supl. 1, Part 3, pp. 10086-10096, AUG, 2012
1424-8220
10.3390/s120810086
Autor
Othero de Brito, Vera Lucia
Cunha, Stephanie Ala
Lemos, Leonardo Violim
Nunes, Cristina Bormio
Institución
Resumen
Cobalt ferrite is a ferrimagnetic magnetostrictive ceramic that has potential application in magnetoelastic and magnetoelectric transducers. In this work, CoFe2O4 was obtained using a conventional ceramic method and Bi2O3 was used as additive in order to obtain liquid-phase sintered samples. Bi2O3 was added to the ferrite in amounts ranging from 0.25 mol% to 0.45 mol% and samples were sintered at 900 degrees C and 950 degrees C. It was observed the presence of Bi-containing particles in the microstructure of the sintered samples and the magnetostriction results indicated microstructural anisotropy. It was verified that it is possible to get dense cobalt ferrites, liquid-phase sintered, with relative densities higher than 90% and with magnetostriction values very close to samples sintered without additives.