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The difference between ferrite magnets and neodymium iron boron magnets Ferrite magnets are metal oxides with ferromagnetism. In terms of electrical properties, the resistivity of ferrite is much higher than that of metal and alloy magnetic materials, and it also has higher dielectric properties. The magnetic properties of ferrite also exhibit high permeability at high frequencies. Therefore, ferrite has become a widely used non-metallic magnetic material in the high-frequency weak current field. It belongs to non-metallic magnetic materials and is a composite oxide (or ferrite) of magnetic iron oxide and one or more other metal oxides. Magnetic force is usually between 800 and 1000 Gauss and is often used in instruments such as speakers and speakers. [3]The advantages of neodymium iron boron magnets are high cost-effectiveness and good mechanical properties; The disadvantage lies in the low Curie temperature point, poor temperature characteristics, and easy pulverization corrosion. It must be improved by adjusting its chemical composition and adopting sur: 07

2023-06

ferrite magnet Produced using powder metallurgy method, with low residual magnetism and low recovery magnetic permeability. The magnetic circuit structure has high coercivity and strong resistance to demagnetization, making it particularly suitable for dynamic working conditions. The material is hard and brittle, and can be used for cutting processing with emery tools. The main raw material is oxide, so it is not easy to corrode. Working temperature: -40 ℃ to+200 ℃.Ferrite magnets can be further divided into anisotropy (anisotropy) and isotropy (isotropy). The magnetic properties of isotropic sintered ferrite permanent magnet materials are weak, but they can be magnetized in different directions of the magnet; Heterogeneous sintered ferrite permanent magnet materials have strong magnetic properties, but can only be magnetized along the predetermined magnetization direction of the magnet.In the actual production of ferrite magnets, raw materials with good chemical composition may not necessarily obtai: 07

2023-06

Liquid magnet In mechanical manufacturing, the seal of the shaft and the body usually uses oily seal of rubber or other elastic materials. This structure has a short life span and poor reliability. It is even more unsuitable for occasions with radioactivity, corrosion, toxic and friction. However, as long as there are several drops of iron magnetic liquids between the shaft and the body, keep them there and then use a ring magnet to magnetize it, which becomes a liquid magnet seal.The liquid magnet seal completely eliminates the contact between the shaft and the body, which greatly reduces friction. At the same time, because the consumption of the iron magnetic liquid is very small, it can work and reliable for a long time. If you use it to seal the vacuum device, it can keep the vacuum of 10 billion mm Hg, which can be described as seamless. All mechanical devices use lubricants to reduce friction. If the iron magnetic liquid lubricating oil is used, the common mechanical "swimming" can be avoided: 07

2023-06

Superconducting magnet application Taking the magnetic suspension train as an example, the application conditions for superconducting magnets are explained.The superconducting materials of the superconducting magnetic caravan application and the magnets constituted should meet the following conditions:① Can produce effective propulsion, suspension and guidance.② When approaching and leaving the ground device state, you can work under permanent current.③ As a vehicle equipment, the weight should be light and small.④ In order to have good electrical performance, the interval size of the surface of the ultra -coil and the cooling container shell is small.⑤ In order to reduce the working load of the car cooling equipment, there must be a good insulation layer.⑥ In order to prevent the interference of mechanical and electrical during operation, there must be sufficient mechanical strength and stabilityMaking superconducting magnets is not only a problem of magnetic materials, it is difficult to explain the short story in thi: 07

2023-06

Superconducting magnet Superconducting magnets refer to the general term for superconducting coils and its maintenance of low temperature containers. Superconducting magnets are the most important core components of the superconducting suspended railway. The promotion, suspension, and guidance of vehicles are generated by the superconducting coil. Like permanent magnets, superconducting magnets can provide stable magnetic fields, and superconducting magnets can also provide high -strength magnetic fields that general permanent magnets cannot provide. This is also the reason why the magnetic floating railway uses superconducting magnets. Due to the development of high -temperature superconductors, superconducting phenomena is generated under the temperature of liquid nitrogen (78K), which greatly improves the performance of superconducting materials. However, as a superconducting material used as a magnetic floating railway, the critical currents of high -temperature superconducting materials in high -strengt: 07

2023-06

Single -sided magnet The magnetic refraction of the single -sided magnet is like the refraction of the signal or the refraction of the light on the signal of the satellite pot. The refractive effect is mainly determined by the following three aspects: 1. Materials: material selection and thickness, and the distance between the magnet and the material is closely close to Relationship. Pure iron skin is easy to leak magnetic. After special treatment, the refraction will be enhanced, but the 100%shielded materials have not yet been studied, but the effects of materials made by different manufacturers are also different. 2. angle: According to the principle of refraction, the arc material is the best effect, and the refractive loss of right -angle materials is large. 3. Space: The magnetic line is like a mobile phone signal in the air, which requires space to refract. If the firecracker cooker is completely wrapped on the lamp gun, the effect is not good, because a large amount of light refraction is lost. How: 07

2023-06

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