Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5440396 | Journal of the European Ceramic Society | 2017 | 5 Pages |
Abstract
In this study, we have compared magnetic and magnetostrictive properties of polycrystalline CoFe2O4 pellets, produced by three different methods, focusing on the use of Spark Plasma Sintering (SPS). This technique allows a very short heat treatment stage while a uniaxial pressure is applied. SPS was utilized to sinter cobalt ferrite but also to make the reaction and the sintering (reactive sintering) of the same ceramic composition. Magnetic and magnetostrictive measurements show that the reactive sintering with SPS induces a uniaxial anisotropy, while it is not the case with a simple sintering process. The induced anisotropy is then expected to be a consequence of the reaction under uniaxial pressure. This anisotropy enhanced the magnetostrictive properties of the sample, where a maximum longitudinal magnetostriction of â229Â ppm is obtained. This process can be a promising alternative to the magnetic-annealing because of the short processing time required (22Â min).
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
A. Aubert, V. Loyau, F. Mazaleyrat, M. LoBue,