Enhancement of the piezoelectric coefficient in PVDF-TrFe/CoFe₂O₄ nanocomposites through DC magnetic poling

• Marco Fortunato,
• Alessio Tamburrano,
• Maria Paola Bracciale,
• Maria Laura Santarelli and
• Maria Sabrina Sarto

Beilstein J. Nanotechnol. 2021, 12, 1262–1270, doi:10.3762/bjnano.12.93

• consisting of CoFe2O4 nanoparticles dispersed in PVDF-TrFe with enhancement of the β phase alignment through an applied DC magnetic field. The magnetic poling was demonstrated to be particularly effective, leading to a piezoelectric coefficient d33 with values up to 39 pm/V. This type of poling does not need

• influenced by magnetic poling, we performed FTIR analyses of six different samples. Figure 1 shows the FTIR spectra of the nanocomposite specimen produced with a CoFe2O4 nanoparticle content of 5 wt %, poled for increasing time (from 60 to 120 min) at increasing strengths of the DC magnetic field (50 and 110

• unaffected by the introduction of CoFe2O4 nanoparticles as well as by the successive magnetic poling processes, we conclude that the relative fraction of the β phase remains nearly constant upon the introduction of the nanoparticles and it is practically unaffected by the magnetic poling. This is in contrast