期刊
SENSORS AND ACTUATORS A-PHYSICAL
卷 247, 期 -, 页码 298-306出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.sna.2016.06.013
关键词
Piezomagnetic; Nanocomposites; Magnetoelectric; Piezoelectric; P(VDF-TrFE); Copolymer
资金
- DGRST, Algerie [Pro Theme/101/2015]
- PHC Volubilis [Maroc MA/11/259]
Nanocomposite films composed of nanoparticles Fe3O4 embedded in copolymers of vinylidene fluoride and trifluoroethylene P(VDF-TrFE) (70/30) have been elaborated. The effect of Fe3O4 content on the cristallinity ratio, dielectric and magnetoelectric properties of the nano-piezo-composites was studied and discussed. Dielectric characterization showed an increase of the permittivity and a decrease of the resistivity with the increasing ratio of nanofillers. Thermal analysis revealed a decrease of the cristallinity of the composite. Poling process was found to be difficult for Fe3O4 contents higher than 1%, because of the low breakdown fields and diminished resistivity with increasing Fe3O4 content. As a consequence, magnetoelectric measurements were conducted only on nanocomposites with Fe3O4 contents lower than 0.5% in the case of poled samples. The optimal value of the first order magnetoelectric (ME) coefficient alpha(p) was obtained for a nanoparticles content of 0.3% wt. (C) 2016 Elsevier B.V. All rights reserved.
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