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磁铁的力量：它们如何影响我们的生活

磁铁的力量虽然看起来很小，但在我们的生活中起着至关重要的作用。它以一种无声而坚定的方式影响着我们的日常生活和工作。

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The Development Trend of Soft Magnetic Materials With the rapid development of electronic information industry, various new requirements have been put forward for high-frequency inductive elements (such as high-frequency transformers, small inductors, etc.), and the performance of Ferrite core, which are the main components of inductive elements, is also required to be improved. Therefore, higher material standards and requirements have been put forward for soft magnetic ferrite materials and magnetic core components, such as miniaturization, chip based, high-frequency, high-performance, and low loss of components. Among soft magnetic ferrite materials, the materials with the highest demand and the most urgent demand for performance improvement are high-frequency low-power loss ferrite materials and high permeability ferrite materials. High frequency low power loss ferrite materials are mainly used for various high-frequency miniaturized switching power supplies (such as AC-DC, DC-AC converters) and Flyback transformer of displays; H: 09

2023-08

Magnet Spirit Magnet [alias] Spirit Magnet; Live magnet; Xuanshi; Chu Shi; Needle aspirating stone; Iron ore; Male magnet; Iron stone[Composition and structure] Magnetite is Magnetite or hematite mineralized Magnetite, often accompanied by quartz and Amphibole. The main component is Fe3O4, which often contains V, Ti, Mg, Mn, Al, etc; Equiaxed crystal system; The crystal is Octahedron; Most of them are granular aggregates or dense blocks.【 Physical and chemical properties 】 Iron black, or with dark blue color; The stripes are black; Semi metallic luster; Uneven fracture surface; Hardness 5.5,; Density 5.16-5.18g/cm3. Having strong magnetism; Insoluble in water, only slightly soluble in acids and alkalis, relatively more soluble in alkali than in acid; The surface is prone to weathering, with a reddish color and reduced gloss and hardness.【 Function and Use 】 It has the functions of calming and calming the mind, tonifying the kidneys and blood, nourishing yang and qi, calming the liver and relieving asthma,: 09

2023-08

Ferrimagnetism Like ferromagnetic materials, when the magnetic field does not exist, Ferrimagnetism materials will still remain magnetized; Like Antiferromagnetism matter, adjacent electrons spin in opposite directions. These two properties are not contradictory. In Ferrimagnetism materials, different atoms belonging to different sublattices have opposite magnetic moments in opposite directions and different values. Therefore, the net magnetic moment of the material is not equal to 0, and the magnetization is not equal to zero, so it has weak ferromagnetism.Because Ferrimagnetism materials are insulators. Ferrimagnetism materials in the high frequency time-varying magnetic field can be used as materials for microwave devices such as isolators, circulators, gyrators and so on, because the induced Eddy current is very small and can allow microwave to pass through.Since the composition of Ferrimagnetism materials must have at least two different magnetic moments, only compounds or alloys can show Ferrim: 09

2023-08

Ferromagnetism The hysteresis loop relationship between magnetization intensity (vertical axis) and H-field (horizontal axis).Inside ferromagnetic materials, like Paramagnetism materials, there are many unpaired electrons. Because of Exchange interaction, the spins of these electrons tend to be in the same direction as the spins of adjacent unpaired electrons. Due to the fact that ferromagnetic materials are divided into many magnetic domains, although the spins of all electrons within the domains are unidirectional, resulting in a "saturation magnetic moment", the direction and magnitude of the magnetic moment are different between domains. Therefore, the net magnetic moment and magnetization vector of an unmagnetized ferromagnetic material are equal to zero.Assuming an external magnetic field is applied, the magnetic moments of these domains tend to be in the same direction as the external magnetic field, thus forming a potentially strong magnetization vector and its induced magnetic field. As the: 08

2023-08

Neodymium iron boron industry will develop rapidly in terms of environmental protection and energy conservation With the advent of the global era of high oil prices, the entry into force of the Kyoto Protocol, and the increasing emphasis on environmental protection and energy conservation by countries around the world, environmental protection and energy conservation are becoming important factors affecting the development of manufacturing industries in various countries. Neodymium iron boron is one of the main raw materials for manufacturing environmentally friendly and energy-saving products. The application of neodymium iron boron in fields such as automobiles, compressors, and wind turbines is precisely based on environmental protection and energy conservation considerations. As a functional material for environmental protection and energy conservation, neodymium iron boron will be more widely used. The neodymium iron boron industry is becoming a new sunrise environmental protection industry.We expect an average annual demand growth rate of around 20% for neodymium iron boron in the next 3-5: 07

2023-08

Overview of neodymium iron boron industry Neodymium iron boron has the characteristics of small volume, light weight, and strong magnetism, making it the most cost-effective magnet to date. It is expected that there will be no alternative magnetic materials to neodymium iron boron in the next 20-30 years. The main raw materials for producing neodymium iron boron permanent magnet materials include metal neodymium, pure iron, boron iron alloy, and other additives.The core technology of the neodymium iron boron industry is mainly reflected in the manufacturing process, specifically in the uniformity, consistency, processing quality, coating quality, and other aspects of its products.The neodymium iron boron industry is a highly patented industry, and only after obtaining a patent license and paying a patent fee can individual magnets or components equipped with magnets be sold in the patent area. The neodymium iron boron patent is a patent package, although the main patent is nearing expiration, there are still many auxiliary pat: 07

2023-08

The world's neodymium iron boron industry is shifting towards China Neodymium iron boron, as the third generation rare earth permanent magnet material, has a high performance price ratio and is widely used in industries such as energy, transportation, machinery, medical, IT, home appliances, etc. Especially with the development of knowledge economy represented by information technology, it continuously brings new uses to functional materials such as rare earth permanent magnet neodymium iron boron industry, which brings broader market prospects for the neodymium iron boron industry.At present, China has become the world's center for manufacturing neodymium iron boron permanent magnets. China has currently formed its own neodymium iron boron industry system, relying on resource and cost advantages, and the industry is developing rapidly. In 2003, the production accounted for over 50% of the world's production, and the world's neodymium iron boron industry is shifting to China.In addition, the global manufacturing industry is currently shifti: 07

2023-08

Three magnetization methods 1. The first type of magnetization belongs to open circuit magnetization. Due to the absence of an external magnetic field circuit during magnetization and the absence of a closed circuit, the magnetization of the magnetic tile is not easy to saturate, which has an impact on the magnetic flux density of the tile. Generally, it is lower than closed circuit magnetization;2. The second type of magnetization is the most commonly used, which belongs to closed circuit magnetization. The magnetic flux density after magnetization is also the highest, and the waveform of the air gap magnetic density can be adjusted by the shape of the magnetization head to meet the requirements of different motor performance. However, during motor assembly, special tools need to be used for assembly, otherwise the rotor may be damaged or the magnetic tile may be broken due to magnetic attraction;3. The third magnetization method also belongs to closed circuit magnetization (because the rotor lamination is a goo: 03

2023-08

Three commonly used magnetization methods for magnetic tiles 1. Magnetize the magnetic tile separately, then install it into the casing, and then assemble it as a whole;2. Install the magnetic tile into the casing (stick it), then magnetize it, and then assemble it as a whole;3. Install the magnetic tile into the casing (glued), then assemble the finished product, and finally magnetize the entire body.The impact of different methods on magnetic tile magnetization:1. The first magnetization method is about 10% lower than the second and third magnetization methods in terms of surface remanence, and generally speaking, using the second magnetization method is more reasonable;2. The first method of magnetization is very convenient. Some factories use solenoid tunnel magnetization, which has high production efficiency;3. The second method of magnetization is that some factories use external flushing, while others use internal flushing. The magnetic tiles or rings need to be glued and dried first, which is also very convenient in production;4. The thi: 03

2023-08

Magnetic tile usage Magnetic pads are mainly used in permanent magnet DC motors, unlike electromagnetic motors that generate a magnetic potential source through excitation coils. Permanent magnet motors use permanent magnet materials to generate a constant magnetic potential source. Permanent magnet pads instead of electric excitation have many advantages, such as simple motor structure, convenient maintenance, light weight, small volume, reliable use, low copper consumption, low energy consumption, etc.The Effect of Magnetic Pad Performance on Electric Motors(1) High residual Magnetic flux density Br. Because under the same magnetic pole surface area and air gap, high Br can generate large output torque and power. Electric motors only have high efficiency.(2) High Hcb. Because the Hcb is high, it is necessary to ensure the required electromotive force for the motor output, so that the motor's working point is close to the maximum magnetic energy product, fully utilizing the ability of the magnet.(3): 03

2023-08

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