Bi2S3-BaTiO3/PVDF composite material and preparation method thereof

A bi2s3-batio3, composite material technology, applied in fixed capacitor parts, fixed capacitor dielectrics and other directions, can solve the problem of low dielectric constant, and achieve the effects of low inorganic content, good machining performance and simple preparation method
CN101423644AInactive Publication Date: 2009-05-06BEIHANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
BEIHANG UNIV
Publication Date
2009-05-06
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a Bi2S3-BaTiO3 / PVDF composite material and a preparation method thereof. The material consists of Bi2S3 nano rod, BaTiO3 and PVDF, wherein the volume fraction of the BaTiO3 is 20 percent, the volume fraction of the Bi2S3 is between 3 and 12 percent, and the balance is the PVDF. The preparation method for the material comprises the following steps: raw materials are weighed according to the volume percentage; the weighed PVDF is added into 30 to 40 milliliters of N, N-dimethyl formamide (DMF), and fully dissolved to form a transparent solution; the weighed BaTiO3 and weighed Bi2S3 powder are added into the solution and uniformly dispersed in the solution through supersonic vibration, so as to prepare stable suspension; the suspension is poured into a surface vessel which is then placed into an oven for drying the suspension, and a dielectric film is obtained; and hot pressing is performed, and the dielectric performance is tested. The preparation method prepares the three-phase Bi2S3-BaTiO3 / PVDF composite material with superhigh dielectric performance by the simple mixing method, and has the characteristics of simple operation, low cost, good mechanical properties, suitability for industrial production, etc.
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Description

technical field

[0001] The invention belongs to the technical field of composite materials, and in particular relates to an ultra-high dielectric three-phase composite material and a preparation method thereof. The material is mainly used for preparing capacitors. Background technique

[0002] In the electronics industry, polymer matrix composites with high dielectric constant have very broad application prospects. For capacitors that use polymer materials as dielectrics, most of the polymer dielectrics currently used are polymer single-phase materials. Since the relative dielectric constant of polymer materials is relatively low, generally only about 1 to 3, the It produces capacitors with low capacitance density. If a polymer-based composite material with a higher dielectric constant is used, the capacitance density can be increased by dozens or even hundreds of times while keeping the capacitor size unchanged, or the capacitance density can be made The size of the capac...

Claims

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