Magnetic loaded rubber absorbing material is a composite material used for absorbing electromagnetic waves. This type of material is usually composed of a rubber matrix and magnetic particles, which absorb electromagnetic wave energy through the distribution of magnetic particles in the rubber matrix, thereby reducing reflection and scattering.
Material composition
The basic components of magnetic loaded rubber absorbing materials include:
- Rubber matrix: Commonly used rubber matrices include natural rubber, nitrile rubber (NBR), silicone rubber, etc. The rubber matrix provides the flexibility and elasticity of the material.
- Magnetic particles: Commonly used magnetic particles include ferrites, carbonyl iron powder (CIP), nickel powder, etc. These magnetic particles can effectively absorb electromagnetic wave energy in high-frequency electromagnetic fields.
Working principle
The working principle of magnetic loaded rubber absorbing materials mainly depends on the absorption of electromagnetic waves by magnetic particles. When electromagnetic waves penetrate materials, magnetic particles absorb the energy of electromagnetic waves due to eddy current effects and hysteresis losses, and convert it into thermal energy to be released. In addition, the presence of rubber matrix also provides auxiliary dielectric loss, further enhancing the material's absorption performance.
Preparation Method
Magnetic loaded rubber absorbing materials can be prepared by the following methods:
- Mixing method: Mix magnetic particles with raw rubber, evenly disperse them through a mixer, and then sulfurize them.
- Injection molding: Mix magnetic particles with rubber matrix and inject them into a mold, then cure and form under certain temperature and pressure.
- Coating method: Mix magnetic particles with a rubber substrate to form a paste, then coat it on the surface of the substrate, followed by drying and vulcanization treatment.
Characteristics and advantages
Magnetic loaded rubber absorbing materials have the following characteristics and advantages:
- Broadband absorption: By designing the type and content of magnetic particles reasonably, electromagnetic wave absorption can be achieved over a wide frequency range.
- Flexibility: The rubber matrix endows the material with good flexibility and elasticity, making it suitable for complex curved or irregularly shaped surfaces.
- Lightweight: Compared to traditional metal absorbing materials, magnetic loaded rubber absorbing materials are more lightweight, which is beneficial for reducing structural weight.
- Easy to process: The rubber matrix makes the material easy to process and shape, and different shapes and sizes can be customized according to specific application requirements.
application area
- In the field of electronics, it can be used for electromagnetic shielding and prevention of electromagnetic interference in electronic devices.
- In the field of communication, the tuning frequency absorption characteristics of flexible and thin magnetic loaded rubber absorbing materials provide important support for signal transmission in high-frequency wireless communication systems. They can be used to absorb interference signals, reduce signal interference, and thus improve the performance and stability of communication systems.
- Radar technology: in radar systems, tuned frequency absorbing materials can be used in radar reflectors and radomes to effectively absorb scattered radar signals, reduce radar transmission power requirements, and improve the detection and positioning accuracy of radar systems.
- Military field: in the military, tuned frequency absorbing materials can be used in stealth fighters, ships and other weapons and equipment, effectively reducing the radar return cross section, reducing the probability of being detected by enemy radar, and improving the concealment and security of operations.
en 
