| 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 type: | Multi-user Equipment Program |
| FAPESP's process: | 09/09524-7 - Characterization of the magnetostriction of cobalt ferrites |
| Grantee: | Vera Lúcia Othéro de Brito |
| Support type: | Regular Research Grants |