Block magnet is a common magnetic device, which is widely used in electronics, machinery, medicine and other fields. In this article, we will introduce the basic structure, magnetic properties, fabrication technology and application fields of block magnets.
Block magnets are made of iron, nickel, cobalt, neodymium, boron and other materials, usually in the shape of a cuboid or cube. Its structure generally includes two adjacent magnetic poles, that is, the south pole and the north pole, and the two poles are fully treated to form a certain magnetic ability.
Block magnets have strong magnetic capabilities, and their main features are as follows:
Strong magnetic force: The magnetic field of the block magnet is very strong, which can absorb and fix a large number of iron products.
Magnetic stability: The magnetic stability of the block magnet is very good, it is not easily affected by the outside world, and can maintain a stable magnetic field for a long time.
Wide range of magnetic field: The block magnet has a wide range of magnetic field, which can be adsorbed and fixed at a long distance.
The direction of the magnetic field is clear: the magnetic field direction of the block magnet is very clear, and the north and south poles are clearly visible.
Powder metallurgy: Powder metallurgy is a common method of making block magnets. First, iron, nickel, cobalt, neodymium, boron and other material powders are mixed together, then pressed and formed at high temperature, and finally heat-treated to make it have good magnetic ability.
Permanent magnetic alloy method: The permanent magnetic alloy method is a method of preparing permanent magnetic materials by high-energy ball milling. When making block magnets, the permanent magnetic alloy after ball milling is pressed into shape, and then heat treated.
Physical vapor deposition method: Physical vapor deposition method, also known as magnetron sputtering method, is to volatilize raw materials into a vacuum environment to form ions, and form a thin film under the collision of ions or gases. When making a block magnet, a thin film is prepared first, and then a block magnet of a corresponding shape is obtained by cutting or etching.
Block magnets have many applications in the field of electric motors. For example, large electrical machines (such as generators, hydroelectric generators, wind turbines, etc.) require powerful magnets to generate high-strength magnetic fields to improve efficiency. In addition, small power tools and household appliances (such as electric toys, vacuum cleaners, electric mixers, etc.) also require block magnets.
Block magnets are also used in disk drives, which are fundamental devices for storing and processing data in computer systems. Bulk magnets play a key role in these devices for locating and reading and writing data.
Block magnets are also used in the medical field. For example, MRI (magnetic resonance imaging) systems, used to detect disease and other problems inside the human body, require the use of very powerful magnets to generate high-strength magnetic fields.
Block magnets also have many applications in the field of scientific research. For example, bulk magnets are used in studies in magneto-optics, magnetization dynamics, proton magnetic resonance, etc.
Block magnets are also used in many other fields such as aerospace, automobile manufacturing, electronic equipment, etc. In the field of aerospace, block magnets are used in aviation motors and aviation systems. In the field of automobile manufacturing, block magnets are used in the motor and control system of electric vehicles. In electronics, block magnets are used in the manufacture of electronic devices such as speakers, televisions and computers.
To sum up, block magnets have a wide range of application fields, and their uses are very extensive. Bulk magnets play important roles in many different fields, contributing to the development of many emerging technologies.
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