Low magnetic field shielding material refers to a material that can shield low magnetic fields (less than 0.1 mT)

     Low magnetic field shielding materialIt refers to materials that can shield low magnetic fields (less than 0.1 mT). These materials are usually composed of magnetic and non-magnetic materials, such as metal materials, glass fibers, carbon fibers, etc.

Low magnetic field shielding materials have applications in many fields. For example, in the medical field, low magnetic field shielding materials can be used to prevent negative effects on patients caused by the magnetic field generated by medical devices implanted in the human body; In electronic products, low magnetic field shielding materials can be used to shield wireless signals and electromagnetic interference; In the aerospace field, low magnetic field shielding materials can be used to prevent internal components of satellites and spacecraft from being disturbed by magnetic fields in space.

The main function of low magnetic field shielding materials is to prevent negative effects of magnetic fields in the external environment on equipment and instruments. Common low magnetic field shielding materials include ferrite, magnetic coatings, metal fibers, etc. Among them, ferrite is a commonly used Low magnetic field shielding materialIt has high magnetic permeability and magnetism, and can resist magnetic fields in the external environment. Magnetic coating can coat ferrite on the substrate material to produce composite materials with certain magnetism, such as magnetic rubber. Metal fiber is a widely used low magnetic field shielding material, which has high strength and hardness, and can resist external forces and wear in the external environment.

Low magnetic field line shielding materials are widely used in fields such as electronics, aerospace, medicine, and industry. Their main function is to prevent negative effects of magnetic fields in the external environment on equipment and instruments, and to improve their stability and reliability.


1、 The generation and harm of low-frequency magnetic fields

1. Due to the use of electronic products, there are a large number of high-frequency signals (including electromagnetic waves of various frequencies) in space. During the propagation of these high-frequency signals in space, a large amount of radiation is generated, which affects the electromagnetic environment of the surrounding environment.

2. With the development of modern industry, various devices are generating more and more radiation sources, which can interfere with the normal operation of other devices and even cause serious consequences. For example, when a machine emits a strong magnetic field during operation, other nearby machines will be severely affected by the magnetic field. Therefore, effective measures must be taken to suppress the radiation generated by various devices.

3. In addition, certain electrical devices can also generate strong currents, which can have adverse effects on human health if they pass through the human or animal body.

2、 The role of low magnetic field shielding materials


1. For some special industries, such as military, medical, scientific research, communication, etc., low magnetic field shielding materials are needed to protect their sensitive electronic components.

2. In addition, for some special places such as substations, subways, large factories, etc., they also need to be used Low magnetic field shielding materialTo reduce electromagnetic interference and damage generated by the external environment.

3. At present, the common low magnetic field shielding products in the market mainly include ferrite and ceramics. Among them, ceramic products have a wide range of applications, not only suitable for the protection of metal materials, but also for the protection of various non-metallic materials such as plastic, glass, wood, etc.

4. Ferrite is a type of iron oxide primarily made from iron powder, which is melted at high temperatures and then chemically reacted with oxidants to form an insulating iron oxide. This substance itself has no electricity, but it can release its charged ions into the surrounding air by applying an external voltage. Therefore, it can absorb some harmful fields present in the surrounding environment and have a certain anti-interference effect.

5. However, due to the easy dissipation of charged ions, it is necessary to ensure a smooth surface during use. Otherwise, it is easy to cause secondary leakage, leading to problems such as leakage and electric shock.

6. In addition, due to the low magnetic permeability of iron, using such products as protective measures can generally only achieve low anti-interference ability and cannot completely eliminate external interference.

In summary, in order to meet the practical needs of different industries, various types of low magnetic isolation products have been developed and widely applied.