Advanced search
Start date
Betweenand
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

Full text
Author(s):
Othero de Brito, Vera Lucia [1] ; Cunha, Stephanie Ala [1] ; Lemos, Leonardo Violim [1] ; Nunes, Cristina Bormio [2]
Total Authors: 4
Affiliation:
[1] Inst Estudos Avancados, BR-12228001 Sao Jose Dos Campos, SP - Brazil
[2] Univ Sao Paulo, Escola Engn Lorena, BR-12600970 Lorena, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: SENSORS; v. 12, n. 8, p. 10086-10096, AUG 2012.
Web of Science Citations: 7
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 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. (AU)

FAPESP's process: 09/54001-2 - Acquisition of cryogen-free equipment for the characterization of magnetic properties by vibrating sample magnetometry
Grantee:Carlos Alberto Moreira dos Santos
Support Opportunities: Multi-user Equipment Program
FAPESP's process: 09/09524-7 - Characterization of the magnetostriction of cobalt ferrites
Grantee:Vera Lúcia Othéro de Brito
Support Opportunities: Regular Research Grants