A method for preparing a high dielectric constant and low dielectric loss CCTO@NH2-rGO / PEI composite thin film material

By preparing CCTO@NH2-rGO/PEI composite thin film materials, the contradiction between high dielectric constant and low dielectric loss of dielectric materials is resolved, and a combination of high dielectric performance and good processing performance is achieved, which is suitable for 5G communication components.

CN116253910BActive Publication Date: 2026-05-26SHANDONG PETROCHEMICAL INST
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHANDONG PETROCHEMICAL INST
Filing Date
2023-04-13
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Existing dielectric materials cannot simultaneously possess high dielectric constant, low dielectric loss, and good processing performance. Traditional ferroelectric ceramic materials are heavy and brittle, polymer dielectric materials have low dielectric constants, and uneven dispersion of nanofillers leads to a decline in mechanical properties.

Method used

A copper titanate calcium-supported aminated reduced graphene oxide/polyetherimide composite material (CCTO@NH2-rGO/PEI) was prepared by removing the solvent through vacuum degassing and heating. CCTO nanoparticles were uniformly embedded in the aminated reduced graphene oxide sheets and combined with PEI to form a composite film with high dielectric constant and low dielectric loss.

Benefits of technology

A composite thin film material with high dielectric constant and low dielectric loss has been developed, which also has good processing performance and is suitable for communication components such as 5G phase shifters. The material has high strength, good heat resistance, and the preparation method is environmentally friendly and pollution-free.

✦ Generated by Eureka AI based on patent content.

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Patent Text Reader

Abstract

This invention relates to a method for preparing a high dielectric constant and low dielectric loss CCTO@NH2-rGO / PEI composite film material. The method first prepares a solution of aminated reduced graphene oxide supported on calcium copper titanate, then disperses PEI resin particles into the solution. After vacuum degassing and heating to remove DMAc solvent, a calcium copper titanate-supported aminated reduced graphene oxide / polyetherimide composite material (CCTO@NH2-rGO / PEI) is obtained. This invention modifies the aminated reduced graphene oxide with calcium copper titanate, allowing CCTO nanoparticles to be uniformly embedded in the layers of the aminated reduced graphene oxide. Then, the CCTO nanoparticles are composited with PEI, significantly improving the dielectric constant of PEI. This method effectively enhances the dielectric constant of the composite material while ensuring good processing performance of the PPO composite material and maintaining low dielectric loss.
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