Barium titanate/polymer composite material with high dielectric constant and its preparation method

Abstract

The invention discloses a barium titanate / polymer composite material with a high dielectric constant and its preparation method. The composite material comprises the following components by volume: 1-60% of a single nucleus, 3-30% of an inner shell, and 20-80% of an outer shell. The single nucleus is composed of barium titanate ceramic particles, the inner shell is polyamide with a high dielectric constant, and the outer shell is polymethyl methacrylate with a low dielectric constant. The invention also relates to a preparation method of the composite material. The method includes: firstly using amino silane to perform surface treatment on the single nucleus, introducing an organic functional group, and then dispersing different products into different monomer solutions in order, thus obtaining the composite material with the nucleus-shell-shell structure connected by covalent bonds. The composite material has the characteristics of high dielectric constant, low dielectric loss, and uniformly distributed inorganic particles. The composite material provided in the invention is suitable for preparation of embedded capacitors, high energy storage capacitors, field emission triodes and other advanced electrical and electronic equipment.

Description

technical field [0001] The invention belongs to the field of high dielectric technology, and in particular relates to a high dielectric constant barium titanate / polymer composite material and a preparation method thereof. Background technique [0002] High dielectric materials have very important applications in electronic appliances and power systems, such as embedded capacitors required by overall packaging technology, thin film transistors, cable terminals, and high-power capacitors required by some advanced weapons. Practical applications require high dielectric materials to have high dielectric constant and low dielectric loss. Traditional high-dielectric materials are mainly high-dielectric ceramics and polymers, but ceramics are easy to break down and difficult to process, and the dielectric constant of polymers is not high, so the performance needs to be further improved, so people have prepared inorganic ceramics / polymer composites . The preparation of composite m...

AI Technical Summary

Problems solved by technology

However, due to the huge difference in the surface properties of ceramics and polymers, the compatibility between the two is not good, resulting in a large amount of agglomeration of inorganic particles, which limits the further improvement of the performance of composite materials.

Images