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- Title
Fabrication and enhanced dielectric constant of nanocomposite films based on polyimide and core–shell structured Al<sub>2</sub>O<sub>3</sub>@0.4mol%Nb-(Ba<sub>0.87</sub>Sr<sub>0.04</sub>Ca<sub>0.09</sub>)(Ti<sub>0.86</sub>Zr<sub>0.08</sub>Sn<sub>0.06</sub>)O<sub>3</sub> nanoparticles
- Authors
Yu, Xuemin; Wang, Junchuan; Sun, Ying; Zhang, Xueqin; Lin, Baoping
- Abstract
A series of nanocomposite films loaded with various concentrations of fillers were successfully synthesized by solution casting method (BSCTZS nanoparticles (NPs) as filler and polyimide (PI) as polymer matrix). To improve the dispersion and the physical–chemical properties of (Ba0.87Sr0.04Ca0.09)(Ti0.86Zr0.08Sn0.06)O3 (BSCTZS) NPs surface, BSCTZS NPs were modified by Al2O3 coating and modified Al2O3@Nb-BSCTZS NPs/PI nanocomposite films were prepared. The prepared modified Al2O3@Nb-BSCTZS NPs were characterized by X-ray diffraction (XRD) analysis, and scanning electron microscopy (SEM), and the dielectric properties of these composites were characterized in details. As a result, the nanocomposite films filled with 5 vol% Al2O3@0.4mol%Nb-BSCTZS nanoparticles exhibit an excellent energy density of 2.11 J cm−3 at 298 kV/mm, which is 48% over the original pristine PI (1.42 J cm−3 at 313 kV/mm). This work can provide a prospective solution for the preparation of composite film materials with high dielectric constant and high energy density.
- Subjects
ALKALINE earth metals; TITANIUM composites; PERMITTIVITY; POLYIMIDE films
- Publication
Journal of Materials Science: Materials in Electronics, 2019, Vol 30, Issue 15, p14391
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-019-01808-w