How to stably control the magnetic permeability of high permeability absorbing materials within a high range

High permeability absorbing materialIt has a wide range of applications in fields such as radar stealth, electromagnetic compatibility, and electronic countermeasures, and the stability of its magnetic permeability directly affects the material's performance. This article will explore how to stably control the magnetic permeability of high permeability absorbing materials within a high range, and reference relevant technologies and data from Advanced Institute (Shenzhen) Technology Co., Ltd. and Research Platinum brand.

1、 Material selection and formula optimization

The magnetic permeability of high permeability absorbing materials first depends on their material composition. By selecting appropriate magnetic materials and optimizing the formula, the magnetic permeability of the material can be significantly improved while maintaining stability.

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• Material selection: Research has shown that ferrites (such as NiZn ferrites) are an ideal choice for preparing high permeability absorbing materials due to their high saturation magnetization and low coercivity. Compared to other magnetic materials, the real part (μ ') of the magnetic permeability of NiZn ferrite can reach over 100 at around 10MHz.
• Formula optimization: By adjusting the ratio of Ni and Zn in the ferrite, the magnetic permeability can be further optimized. Advanced Institute Technology has found through extensive experiments that when the Ni/Zn molar ratio is 0.5, the magnetic permeability reaches its maximum value and the stability is optimal. Compared with the unoptimized formula, the magnetic permeability is increased by about 20%, while the fluctuation range is reduced to ± 5%.

2、 Microstructure regulation

The microstructure of materials has a significant impact on magnetic permeability. By controlling the grain size, morphology, and orientation, the magnetic permeability of the material can be effectively improved while maintaining stability.

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• Grain size: Grain refinement helps improve the magnetic permeability of materials.Research Platinum BrandHigh permeability absorbing materialBy adopting advanced nanotechnology, the grain size of ferrite is controlled within the range of tens of nanometers. Compared with micrometer sized grains, the magnetic permeability is increased by about 30%, and the stability is better at different temperatures.
• Morphology control: By controlling the synthesis conditions, ferrite particles with specific morphologies, such as flakes, needles, etc., can be prepared. These particles with special morphologies can generate stronger magnetic anisotropy, thereby increasing magnetic permeability. Research by Advanced Institute of Technology shows that the magnetic permeability of sheet-like ferrite particles is about 25% higher than that of spherical particles.

3、 Optimization of Heat Treatment Process

Heat treatment is an important means to improve the magnetic properties of materials. By precisely controlling the heat treatment temperature, time, and atmosphere, the microstructure of the material can be optimized, thereby improving magnetic permeability and maintaining stability.

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• Heat treatment temperature: Studies have shown that appropriate heat treatment temperature can promote the growth and phase transition of ferrite grains, thereby increasing magnetic permeability.Advanced Institute of TechnologyThe optimal heat treatment temperature was determined to be 1200 ° C through multiple experiments, at which point the magnetic permeability reached its peak, and as the temperature further increased, the magnetic permeability began to decrease.
• Heat treatment time: Heat treatment time is also a key factor. Excessive or insufficient heat treatment time can affect the microstructure and magnetic properties of materials. Yanbo brand controls the fluctuation range of magnetic permeability within ± 3% by precisely controlling the heat treatment time.

4、 External environmental control

High permeability absorbing materials are affected by external environmental factors such as temperature and humidity during use, resulting in changes in magnetic permeability. Therefore, taking effective measures to control the external environment is crucial for maintaining the stability of material magnetic permeability.

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• Temperature stability: Within the temperature range of -25 ° C to 125 ° C, advanced packaging technology and material modification methods are used to control the magnetic permeability change rate of high permeability absorbing materials prepared by Advanced Institute Technology within ± 5%, demonstrating excellent temperature stability.
• Humidity stability: Under the condition of relative humidity ranging from 30% RH to 90% RH, the high permeability absorbing material of Yanbo brand has undergone special treatment, and the rate of magnetic permeability change is also controlled at a low level, ensuring the effectiveness of the material in different humidity environments.

5、 Conclusion

Stability ControLHigh permeability absorbing materialIn the high range of magnetic permeability, it is necessary to start from multiple aspects such as material selection and formulation optimization, microstructure control, heat treatment process optimization, and external environmental control. By using advanced technology and the technical achievements and empirical data of the Research Platinum brand as references, the magnetic permeability of materials can be more effectively improved and their stability can be maintained, meeting the high-performance requirements in practical applications. In the future, with the continuous development of materials science and electromagnetic technology, the performance of high permeability absorbing materials will be further improved, and their application fields will be more extensive.

The above data is for reference only, and specific performance may vary due to production processes and product specifications.