Trilayer polymer composites based on ferroelectric skeletons toward high-k materials with high breakdown strength. (December 2022)

• Record Type: Journal Article
• Authors: Du, Houmeng; Shi, Zhicheng; Liu, Dong; Zhang, Wenqiang; Liu, Yao; Fan, Runhua
• Is Part Of: Materials today communications. Volume 33(2022)
• Publication Date: 2022-12
• Subjects: Polymer composite -- Dielectric constant -- Breakdown strength -- Multilayer; Materials science -- Periodicals; 620.11
• DOI: 10.1016/j.mtcomm.2022.104793
• Languages: English
• ISSNs: 2352-4928

Abstract

Abstract: Polymers with high dielectric constant (high- k ) are widely used in various electronic devices. However, the low breakdown strength greatly hinders their applications in high voltage fields. To address this issue, we herein report a unique design of trilayer polymer composites based on ferroelectric skeleton. In this design, the strong polarization of ferroelectric skeleton provides high- k, while the pure polymer layers offer high breakdown strength. Consequently, a high dielectric constant of ∼ 62 at 10 kHz and a high breakdown strength of ∼ 48 V/μm are concurrently obtained. This work offers an effective strategy to design high- k materials with high breakdown strength, which would also be illuminating for the design of other functional composites. Graphical Abstract: ga1 Highlights: A new design of high- k epoxy composite with a trilayer structure and ferroelectric 3D Ag/Al2 O3 /BaTiO3 filler skeleton is developed. A high dielectric constant of ∼ 62 at 10 kHz and a high breakdown strength of ∼ 48 V/μm are concurrently obtained. Finite element simulation is performed to clarify the breakdown behaviors of the trialyer composites.