Publicação
Spray-printed magnetoelectric multifunctional composites
| Resumo: | The performance of spray-printed magnetoelectric (ME) composites based on poly (vinylidene fluoride-co-trifluoroethylene)/cobalt ferrite, P(VDF-TrFE)/CoFe2O4, is reported and discussed. Spray-printing has been chosen as a production technique since it is a transformative approach to industrial production. With the addition of 20 wt% of ferrite content, the resulting composite exhibits a fibrillar-porous structure, an ≈1.8 GPa Young's Modulus, a saturation magnetization of 11.2 emu. g−1, a 6.0 emu. g−1 magnetic remanence and a magnetic coercivity of 2050 Oe. The high dielectric (34 dielectric constant at 10 kHz) and piezoelectric (−27 pC.N−1) responses explain the high ME coupling of 21.2 mV cm−1 Oe−1 at an optimum magnetic field of 2450 Oe. The high ME response and the simple/scalable additive manufacturing method demonstrates the suitability of these materials for cost-effective and large-scale sensor/actuator applications, namely in aerospace, automotive and recreational products |
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| Autores principais: | Martins, Pedro Libânio Abreu |
| Outros Autores: | Nunes, J. S.; Oliveira, J.; Peřinka, N.,; Lanceros-Méndez, S. |
| Assunto: | Nano-engineered materials Smart materials Magnetic composites Additive manufacturing Polymers |
| Ano: | 2020 |
| País: | Portugal |
| Tipo de documento: | artigo |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Universidade do Minho |
| Idioma: | inglês |
| Origem: | RepositóriUM - Universidade do Minho |
| Resumo: | The performance of spray-printed magnetoelectric (ME) composites based on poly (vinylidene fluoride-co-trifluoroethylene)/cobalt ferrite, P(VDF-TrFE)/CoFe2O4, is reported and discussed. Spray-printing has been chosen as a production technique since it is a transformative approach to industrial production. With the addition of 20 wt% of ferrite content, the resulting composite exhibits a fibrillar-porous structure, an ≈1.8 GPa Young's Modulus, a saturation magnetization of 11.2 emu. g−1, a 6.0 emu. g−1 magnetic remanence and a magnetic coercivity of 2050 Oe. The high dielectric (34 dielectric constant at 10 kHz) and piezoelectric (−27 pC.N−1) responses explain the high ME coupling of 21.2 mV cm−1 Oe−1 at an optimum magnetic field of 2450 Oe. The high ME response and the simple/scalable additive manufacturing method demonstrates the suitability of these materials for cost-effective and large-scale sensor/actuator applications, namely in aerospace, automotive and recreational products |
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