Polyamide-11/lead zirconate titanates—a novel composite material with high dielectric properties

Abstract

Polymeric composites gain increasing interest in materials research and practice applications due to combining excellent electric property of piezoelectric ceramic and flexibility of polymer matrix. A novel decoupling capacitor with high dielectric constant has been developed by mixing polyamide-11 (PA11) with ferroelectric ceramic lead zirconate titanates (PZT). The composite demonstrates high dielectric constant, with better frequency stability and low dielectric losses. The dependence of the dielectric constant on frequency and polymer fraction was investigated. The excellent dielectric constant of 100 and the dielectric loss of 0.1 can be obtained at a PA11 volume fraction of 0.4. The enhanced dielectric behavior originates from good connection between ferroelectric ceramic and PA11 Dielectric losses of the PZT/PA11 composites change slightly with the test frequency. Our findings suggest that the created polymeric composites with relatively high dielectric constant represent a novel type of material that is flexible and easy to process. Moreover, is suited to applications in advanced decoupling capacitors and flexible electronics.