Study On The Dielectric Properties And Preparation Of 0-3 Modifying Ceramic/polymer Composites

With modern microelectronics industry continues to progress and development, growing concern 0-3 modifying ceramic/polymer composites, how to improve the dielectric properties of the composite material scientists from various countries have become a hot research. In this paper, on the basis of considering the ceramic particle surface modification and interfacing role, proposed modifying ceramic surface adoption a chelating agent to improve the composite interface connection, thereby further improving the dielectric properties of 0-3 modifying ceramic/polymer two-phase composites and ceramics/polymer/metal three-phase composites.In order to improve the dielectric properties of the ceramic/polymer composites and ceramic/polymer/metal composites, the paper launched experiments in the following aspects:1. In this paper use of EDTA, tartaric acid and sodium-gluconate surface modification for barium titanate(BT), and prepared different volumes of a modified composition ceramic/polyamide composites. Dielectric performance analysis shows: tartaric acid chelating agent is the best.2. prepared by pressing a series of tartaric acid modified composites, preparation of ceramic volume fraction is 70%,the modified BT/polyamide composite dielectric properties preferably, in the 100 Hz frequency, the dielectric constant increased to 75.9 from 73.8, dielectric loss has remained at a low level. Meanwhile prepare different volume fractions of modified ceramics BT/epoxy composites, when the ceramic volume fraction of 30%, the dielectric properties of the modified BT/epoxy resin to achieve the best. In the 100 Hz frequency, the dielectric constant increased to 17.6 from 12.1. Their composite infrared spectroscopy showed that: tartaric acid and surface of ceramic particles Ba2+ chelation reaction to form chelates layer composites have been introduced to the interface region. The modified ceramic composites SEM image analysis and XRD patterns showing: after modifying ceramic crystal structure unchanged, the modified connectivity between the ceramic particles and the polymer has improved, BT uniformity of the surface layer ofthe chelate significantly improved the internal interfacing composites and improve the dispersion of BT in the system.3. By introducing the nickel powder in two phases composite, prepared the various amounts of the modified BT/polyamide/Ni composites and modified BT/epoxy/Ni composites, dielectric performance analysis shows: adding Ni metal particles in the modified BT/polyamide/Ni composites and modified BT/epoxy/Ni composites can improve the dielectric properties of the composite material, in the modified BT/ polyamide/Ni three-phase composite, when Ni volume fraction of 16%, the dielectric constant of the modified BT/polyamide/Ni composite material reaches 181.2(100Hz), when compared to the dielectric constant of not adding nickel powder composites increased by 139%, The modified BT/epoxy/Ni composites, when Ni volume fraction of 30%, the dielectric constant of the modified BT/epoxy/Ni composites reaches 55.13(100Hz), than not to add Ni composite dielectric dielectric constant increase of 212.35%,infrared spectra showed that the composite material, tartaric acid and surface of ceramic particles Ba2+ chelation reaction to form chelates layer composites have been introduced to the interface region. The modified ceramic composites SEM image analysis and XRD patterns showing: the modified crystal structure of the ceramic powder and Ni no change, BT uniformity of the surface layer of the chelate significantly improved the internal interfacing composites and improve the dispersion of Ni in the system.