Skip to main content
main-content

Tipp

Weitere Artikel dieser Ausgabe durch Wischen aufrufen

08.07.2021 | Original Research Article | Ausgabe 10/2021

Journal of Electronic Materials 10/2021

Dielectric Properties and Phase Stabilization of PVDF Polymer in (1−x)PVDF/xBCZT Composite Films

Zeitschrift:
Journal of Electronic Materials > Ausgabe 10/2021
Autoren:
Tarun Garg, Venkateswarlu Annapureddy, K. C. Sekhar, Dae-Yong Jeong, Navneet Dabra, Jasbir S. Hundal
Wichtige Hinweise

Supplementary Information

The online version contains supplementary material available at https://​doi.​org/​10.​1007/​s11664-021-09075-4.

Publisher's Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Abstract

Polyvinylidene fluoride (PVDF) is a semi-crystalline ferroelectric polymer which can be stabilized in its distinct electroactive polymorphs α and γ by selective processing techniques. In this article, to study the effect of processing temperature and barium calcium zirconium titanate (BCZT) ceramic-doping on PVDF phase stabilization, the pure PVDF and PVDF/BCZT composite films were fabricated by solution-casting and melt-pressing. The Fourier-transform infrared spectroscopy and x-ray diffraction studies showed that the pure PVDF and PVDF/BCZT composite films fabricated by solution-casting possessed the characteristic γ-PVDF peaks while melt-pressing stabilized PVDF mostly in the α-phase. The BCZT ceramic particles were found to have no significant effect on PVDF phase stabilization, but it enhanced the overall crystallinity of polymer matrix. The dielectric studies revealed that the relative permittivity (εr) of γ- and α-PVDF phases in pure PVDF film samples was ≈ 10 and 7.5 (at 120 Hz) respectively. The εr of PVDF/BCZT composite films having 50 wt.% BCZT content synthesized by solution-casting and melt-pressing were estimated to be ≈ 31 and 20 (at 120 Hz), respectively, which was about three times that of pure PVDF film synthesized by the respective technique. The value of loss tangent (tanδ) for pure PVDF films synthesized by solution-cast and melt-press technique were ≈ 0.07 and 0.35 (at 120 Hz) respectively. In temperature-dependent dielectric studies, γ-PVDF showed distinct α-relaxation peak at ≈ 120°C and polymer melting at temperature > 130°C. For α-PVDF, the increase in εr and tanδ was observed during α-relaxation transition at higher temperatures. The dielectric studies indicated that the introduction of BCZT ceramic particles in PVDF matrix increased the εr-value by enhancing the dipolar and interfacial polarizations in composites, while the decrease in tanδ-value was observed due to decrease in molecular dipoles with a decrease in wt.% of PVDF content. These phenomena collectively improved the overall electric properties of ceramic/polymer composites which makes them suitable candidates to explore for flexible electroactive material form.

Bitte loggen Sie sich ein, um Zugang zu diesem Inhalt zu erhalten

Sie möchten Zugang zu diesem Inhalt erhalten? Dann informieren Sie sich jetzt über unsere Produkte:

Springer Professional "Wirtschaft+Technik"

Online-Abonnement

Mit Springer Professional "Wirtschaft+Technik" erhalten Sie Zugriff auf:

  • über 69.000 Bücher
  • über 500 Zeitschriften

aus folgenden Fachgebieten:

  • Automobil + Motoren
  • Bauwesen + Immobilien
  • Business IT + Informatik
  • Elektrotechnik + Elektronik
  • Energie + Umwelt
  • Finance + Banking
  • Management + Führung
  • Marketing + Vertrieb
  • Maschinenbau + Werkstoffe
  • Versicherung + Risiko

Testen Sie jetzt 30 Tage kostenlos.

Springer Professional "Technik"

Online-Abonnement

Mit Springer Professional "Technik" erhalten Sie Zugriff auf:

  • über 50.000 Bücher
  • über 380 Zeitschriften

aus folgenden Fachgebieten:

  • Automobil + Motoren
  • Bauwesen + Immobilien
  • Business IT + Informatik
  • Elektrotechnik + Elektronik
  • Energie + Umwelt
  • Maschinenbau + Werkstoffe




Testen Sie jetzt 30 Tage kostenlos.

Zusatzmaterial
Nur für berechtigte Nutzer zugänglich
Literatur
Über diesen Artikel

Weitere Artikel der Ausgabe 10/2021

Journal of Electronic Materials 10/2021 Zur Ausgabe