%0 Journal Article
%T Magnetic Properties of Liquid-Phase Sintered CoFe2O4 for Application in Magnetoelastic and Magnetoelectric Transducers
%A Vera L¨˛cia Oth¨¦ro de Brito
%A St¨¦phanie Al¨˘ Cunha
%A Leonardo Violim Lemos
%A Cristina Bormio Nunes
%J Sensors
%D 2012
%I MDPI AG
%R 10.3390/s120810086
%X 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 ˇăC and 950 ˇăC. 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.
%K magnetic ceramics
%K ferrites
%K magnetostriction
%K magnetoelastic sensitivity
%K magnetomechanical sensors
%K ceramics processing
%K liquid-phase sintering
%U http://www.mdpi.com/1424-8220/12/8/10086