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Sensors 2012, 12(8), 10086-10096; doi:10.3390/s120810086
Article

Magnetic Properties of Liquid-Phase Sintered CoFe2O4 for Application in Magnetoelastic and Magnetoelectric Transducers

1,* , 1
, 1
 and 2
Received: 31 May 2012; in revised form: 9 July 2012 / Accepted: 10 July 2012 / Published: 25 July 2012
(This article belongs to the Section Physical Sensors)
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Abstract: 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 °C and 950 °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.
Keywords: magnetic ceramics; ferrites; magnetostriction; magnetoelastic sensitivity; magnetomechanical sensors; ceramics processing; liquid-phase sintering magnetic ceramics; ferrites; magnetostriction; magnetoelastic sensitivity; magnetomechanical sensors; ceramics processing; liquid-phase sintering
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

de Brito, V.L.O.; Cunha, S.A.; Lemos, L.V.; Nunes, C.B. Magnetic Properties of Liquid-Phase Sintered CoFe2O4 for Application in Magnetoelastic and Magnetoelectric Transducers. Sensors 2012, 12, 10086-10096.

AMA Style

de Brito VLO, Cunha SA, Lemos LV, Nunes CB. Magnetic Properties of Liquid-Phase Sintered CoFe2O4 for Application in Magnetoelastic and Magnetoelectric Transducers. Sensors. 2012; 12(8):10086-10096.

Chicago/Turabian Style

de Brito, Vera Lúcia Othéro; Cunha, Stéphanie Alá; Lemos, Leonardo Violim; Nunes, Cristina Bormio. 2012. "Magnetic Properties of Liquid-Phase Sintered CoFe2O4 for Application in Magnetoelastic and Magnetoelectric Transducers." Sensors 12, no. 8: 10086-10096.


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