[Retracted Article] Performance of Ba_0.95Ca_0.05Zr_0.15Ti_0.85O₃/PVDF composite flexible films

Abstract

Calcium barium zirconate titanate (Ba 0.95 Ca 0.05 Zr 0.15 Ti 0.85 O 3 , BCZT) ceramic particles were obtained by conventional ceramic processing method. BCZT powders were modified by dopamine through chemical coating method. The composite films based on dopamine@BCZT and polyvinylidene fluoride were fabricated by solution casting method. The microstructure and morphology were characterized by X-ray diffraction, high-resolution transmission electron microscopy, and field emission scanning electron microscope. The impedance analyzer and dielectric withstand voltage test were used to test the dielectric constant, loss tangent, and breakdown strength. TEM results displayed that dopamine was coated on the surface of BCZT particles uniformly with an average thickness of 20 nm. SEM results revealed that the ceramic particles were dispersed homogeneously in the matrix. The dielectric constant increased with the increasing of BCZT contents, while the loss tangent remained constant in the frequency range of 10 3 to 10 5 Hz.

Polarization and space charge performance in PVDF with MPB composition BCZT doped composite films

“…As a kind of semicrystalline polymer, the polarization is a complex process because of the dipole turn rolling, the space charge (SC) accumulation between crystalline phase and amorphous phase under the external electric field. [11][12][13][14][15] Relevant research also pointed out that the improvements of electrical properties are closely related to the changes of inner charge carrier trap and polarization mechanism for the dielectric materials. 4,5 However, with the development of electronic and electric industries, the traditional single phase polymer materials have been difficult to meet the increasing requirements of application in various fields.…”

“…[6][7][8][9][10] And the incorporation of appropriate quantities of barium titanate and BCZT particles-filled in PVDF matrix has been found significantly to enhance its dielectric constant and energy storage density. [11][12][13][14][15] Relevant research also pointed out that the improvements of electrical properties are closely related to the changes of inner charge carrier trap and polarization mechanism for the dielectric materials. [16][17][18] Then the introduction of BCZT will bring following changes for the PVDF matrix: (1) the introduction of BCZT will increase the interfaces between organic and inorganic materials.…”

Study on the Modification of Polyvinylidene Fluoride Films with Barium Zirconate Titanate to Achieve Excellent Dielectric Property

“…Therefore, barium zirconate titanate with high dielectric constant ceramic can be modified and blended with PVDF which has high breakdown strength to obtain a composite film with the advantages of the two materials. This composite film can meet many requirements of modern capacitors and be applied to high‐power energy storage devices [30–36] …”

“…When the volume fraction of BST reaches 4.4vol%, energy storage density of composite materials is twice higher than pure membrane. Wang et al [33] . prepared Ba 0.95 Ca 0.05 Zr 0.15 Ti 0.85 O 3 /PVDF composite flexible films possessing high dielectric constant and low dielectric loss.…”

“…This composite film can meet many requirements of modern capacitors and be applied to high-power energy storage devices. [30][31][32][33][34][35][36] In order to improve the comprehensive performance of barium titanate ceramic powder and PVDF composite material, coating ceramic powder is one of the mainstream methods. [37] The composite material prepared by coating method has an excellent performance.…”