First, the history of magnetized water. Magnetism is one of the four fundamental forces in nature. The compass, one of the four great inventions in ancient my country, is an example of the ingenious application of magnetism. As early as 500 years ago, Li Shizhen, a medical scientist in the Ming Dynasty, discovered that the water treated with magnetic force has the effects of "removing sores and fistulas, long skin", "drinking for a long time, making it suitable for drinking", and "improve yang" (see " Compendium of Materia Medica, pages 583-586), can strengthen the body and treat various diseases. However, the magnetic material used by the ancients is a naturally occurring natural magnet-magnetite, and its magnetic properties are very low compared with modern synthetic magnetic materials.

Vehicle electronics is considered to be a revolution in the development of automobile technology. The degree of automobile electronics is regarded as an important symbol to measure the level of modern automobiles, and is the most important technical measure to develop new models and improve automobile performance. Automakers believe that increasing the number of automotive electronic devices and promoting automotive electronics is an effective means to capture the importance of the future automotive market. With the rapid development of the automotive electronics industry, it also provides a promising development space for automotive micro-motor products.

In the process of electromagnetic compatibility describing digital circuits, we often use magnetic beads, the principle of magnetic bead filters and how to use them? Ferritic magnesium alloy iron or iron-nickel alloy, with high permeability material, it can be considered as the minimum limit of inductance coil capacitance between high frequency and high impedance. Ferrite materials are usually used in high frequency applications, due to their primary characteristic method of inductance at low frequencies, a small loss of line. At high frequencies, this is the primary reactance...

Ferrite magnets are sintered permanent magnetic materials composed of barium and strontium iron. In addition to strong anti-demagnetization properties, this magnetic material has the advantage of low cost. Ferrite magnets are hard and brittle, and require special machining processes. Because the opposite-sex magnets are oriented along the manufacturing direction, they must be magnetized in the direction taken, while the same-sex magnets can be magnetized in any direction because they are not oriented, although a slightly stronger magnetic induction is often found on the side where the pressure-receiving surface is the smallest.

A brief introduction to the manufacturing process of NdFeB magnets. As the third-generation rare earth permanent magnet material, NdFeB magnets have a high cost performance ratio. NdFeB magnets are widely used in energy, transportation, machinery, medical, IT, home appliances and other industries. Then you know its production process. The following editor will briefly introduce it to you: 1. Raw material preparation and pretreatment: Process introduction: Pretreatment of raw materials such as weighing, crushing, breaking and rust removal.

Sintered magnets are currently the largest commodity magnets. The process basically follows the powder metallurgy method for preparing samarium-cobalt magnets. The procedures are: melting and sintering - alloy ingot crushing - grinding - orientation forming under magnetic field - sintering - tempering and aging - magnetization detection and so on. First, Fe and B are smelted into Fe-B alloy, and then in a vacuum reaction furnace according to certain requirements, they are melted into a ternary alloy under Ar gas, and cast into a water-cooled copper mold. Then it is pulverized, usually by methods such as ball milling and jet milling...