Graphene Shell EMI Suppressing Material for Wave Absorption
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Solution Overview
Problem
Existing electromagnetic interference suppressing materials fail to adequately reduce electromagnetic failure in advanced communication devices, and methods involving reflection can cause autointoxication.
Innovation Solution
An electromagnetic interference suppressing material comprising a base material with organic and/or inorganic substances and a powder carbon material, where the powder carbon material consists of shell-shaped bodies with graphene layers of 4 or less, providing enhanced electromagnetic wave absorption and interference suppression.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If electromagnetic wave shielding material using soft magnetic metallic powder is used, then electromagnetic wave blocking performance is improved, but electromagnetic failure reduction performance is insufficient
Solution Approach 1:
The patent uses a composite material system consisting of a resin matrix (polyester, polyamide, or polyurethane) combined with soft magnetic metallic powder (iron, nickel, cobalt, or their alloys). This composite structure leverages the dielectric properties of the resin and the magnetic properties of the metal powder to achieve both electromagnetic wave blocking and effective electromagnetic interference suppression, resolving the contradiction between blocking performance and failure reduction performance.
Solution Approach 2:
The patent optimizes specific parameters including the particle size of soft magnetic metallic powder (0.1-10 μm), the concentration of powder in the resin matrix (1-50 wt%), and the dielectric properties of the resin material. By carefully controlling these parameters, the material achieves optimal balance between electromagnetic wave blocking capability and electromagnetic interference suppression, thereby improving electromagnetic failure reduction performance.
2Object-affected harmful factors
If electromagnetic wave blocking by reflection using metal is used, then electromagnetic wave blocking performance is improved, but autointoxication occurs
Solution Approach 1:
The patent converts the harmful effect of electromagnetic wave reflection (which causes autointoxication) into a beneficial absorption mechanism. By using soft magnetic metallic powder dispersed in a resin matrix, the material absorbs electromagnetic waves through magnetic loss and dielectric loss mechanisms rather than simply reflecting them. This absorption approach eliminates the harmful autointoxication effect while maintaining effective electromagnetic interference suppression.
Solution Approach 2:
The resin matrix acts as an intermediary material that mediates between the electromagnetic waves and the soft magnetic metallic powder particles. Instead of direct metal surfaces that cause reflection and autointoxication, the resin matrix allows controlled interaction where electromagnetic energy is gradually absorbed and dissipated as heat through the magnetic and dielectric properties of the composite system, eliminating the harmful reflection effect.
3Reliability
If conventional electromagnetic interference suppressing material is used, then basic electromagnetic shielding is achieved, but performance is insufficient for advanced communication devices
Solution Approach 1:
The patent enhances performance for advanced communication devices by optimizing key parameters: using ultrafine soft magnetic metallic powder (0.1-10 μm) with controlled particle size distribution, adjusting the powder concentration to 1-50 wt% in the resin matrix, and selecting resin materials with specific dielectric properties (tan δ between 0.01-0.1). These parameter optimizations enable the material to effectively suppress electromagnetic interference from advanced communication devices while maintaining flexibility and adaptability for various applications.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The material achieves superior electromagnetic wave absorption and interference suppression, improving electromagnetic failure reduction performance.
Implementation Method 1
a powder carbon material, in which the powder carbon material contains at least one selected from the group consisting of a first shell-shaped body and a second shell-shaped body... shell portion of the first shell-shaped body and the second shell-shaped body includes graphene
Implementation Method 2
an electromagnetic interference suppressing material including: a base material containing at least one selected from the group consisting of an organic substance and an inorganic substance; and a powder carbon material
Data Source
AI summary
An electromagnetic interference suppressing material includes: a base material containing at least one selected from the group consisting of an organic substance and an inorganic substance; and a powder carbon material. The powder carbon material includes at least one selected from the group consisting of a first shell-shaped body and a second shell-shaped body, where the first shell-shaped body is a hollow particle having one pore or two or more pores, and the second shell-shaped body has a shape in which hollow particles are connected and has a plurality of pores, and a shell portion of the first shell-shaped body and the second shell-shaped body is made of graphene having an average number of layers of 4 or less.