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Everyday life is all about magnetism. Without it, we wouldn't be able to watch TV, listen to the radio, or talk on the phone. Without it, even the night is dark. Although mankind has long recognized the magnetic phenomenon, but until modern times, people's understanding of the magnetic phenomenon is gradually systematized, the invention of countless electromagnetic instruments, such as the telephone, radio, generator, electric motor, and so on. Today, magnetic technology has penetrated into our daily life and every aspect of industrial and agricultural technology, we have become more and more inseparable from the widespread use of materials.
Magnetic material because the magnetism of the material can neither be seen nor touched, we cannot directly experience the existence of magnetism through our five senses (hearing, feeling and touch).
A magnet for sight, taste, and smell always has two poles, one is n-pole, the other is s-pole. A magnet, if cut through the middle, becomes two magnets, each with a pair of poles. No matter how small a magnet is divided, it will always have N and S poles, which means that the N and S poles are always in pairs, and you cannot make a magnet have only N or only S poles.
There is an interaction between the magnetic poles, that is, like repulsion, opposites attract. In other words, the N and S poles attract each other when they get close, and the N and N poles repel each other when they get close. Knowing this, we can see why a compass automatically indicates direction.
It turns out that the earth is a giant magnet, with its N pole near the geographic South Pole and its S pole near the geographic North Pole. In this way, if a long magnet is suspended in the middle by a thin wire and allowed to rotate freely, the n-pole of the magnet and the s-pole of the earth will attract each other, and the n-pole and s-pole of the magnet will point towards the earth.
The S pole and the N pole of the earth attract each other, making the magnet rotate in the direction of the magnet until the S and N poles of the magnet. At this time, the direction indicated by the N pole of the magnet is the geographical North Pole of a lot of magnetic magnets), generally divided into hard < permanent > magnet (magnetic stay longer or permanent time) and soft magnet (in a short time class, we said the magnet, generally refers to the permanent magnet. Permanent magnet divides two categories: the first major categories are: metal alloy (Nd2Fe14B) including magnet ndfeb magnet, ALNiCO magnets, samarium cobalt magnet (ALNiCO) (SmCo), including: 1, ndfeb magnet, it is found that commercialization of the highest performance magnets, known as magnetic king, has extremely high magnetic the maximum magnetic energy product (BHmax) above Ferrite (Ferrite) more than 10 times. Its own mechanical processing performance is also quite good. Operating temperature up to 200 degrees Celsius. And its texture is hard, performance is stable, has very good cost performance, so it is used extremely widely. But because its chemical activity is very strong, so must treat to its surface coating.
(such as Zn,Ni, electrophoresis, passivation, etc.). Aluminum-nickel-cobalt magnet: an alloy of aluminum, nickel, cobalt, iron, and other trace metals.
Casting process can be processed into different sizes and shapes, machinability is very good. The cast alnico permanent magnet has the lowest reversible temperature coefficient and the operating temperature can be as high as 600 degrees Celsius. Alnico permanent magnet products are widely used in various instruments and other applications. 3. Samarium cobalt (SmCo) can be divided into SmCo5 and Sm2Co17 according to the different components. Due to the high price of its materials, SmCo, as a rare earth permanent magnet, not only has a high magnetic energy product (14-28 mgoe), which limits its development.
Reliable coercivity and good temperature characteristics. Samarium cobalt magnets are better suited to work at high temperatures than ndfeb magnets.
The second category is Ferrite, which mainly includes BaFe12O19 and SrFe12O19. Made by ceramic process, the texture is relatively hard, the property of moderate, has become the most widely used brittle materials, because ferrite magnets have good temperature resistance, low price, permanent magnets.
In electromagnetics, the phenomenon occurs when two magnets or magnets attract or repel each other, or when a current-carrying wire creates a magnetic field around it that deflects the needle, or when a closed circuit moves over an uneven magnetic field. Anything that has to do with magnetism has to do with magnetic fields.
There will be an electric current in a closed circuit, and these are all related to magnetism which is a property of matter in response to the action of a magnetic field. Every substance is more or less affected by magnetic fields.
Ferromagnetism is the strongest and best known form of magnetism. Because of its ferromagnetism, a magnet or magnet produces a magnetic field. In addition, paramagnetic materials tend to move towards regions with strong magnetic fields, that is, they are attracted by magnetic fields. Diamagnetic materials tend to move toward areas where the magnetic field is weak, which means they are repelled by the magnetic field. There are other materials that have more complex relationships with magnetic fields, for example, and so on. The effect of the external magnetic field on some materials is very weak.
The properties of spin glass, antiferromagnetism and other material magnetic state with temperature, pressure, external magnetic field, etc., depending on the temperature or other parameters, the material will show different magnetic.
Xiamen everbeen magnet co., ltd. is a research and development, production, sales as one of the private enterprises.
Main production and marketing of the same sex rubber magnets (magnetic products); The leading products of the company with high technology content: various specifications and high performance magnetic bar, tile magnetic, square magnetic, circular magnetic, ring magnetic, cutting magnetic, high temperature resistant powerful magnet, etc. It is widely used in electrical machinery, electronics, electrical appliances, toys, health care and other fields. At the same time in the production of large block magnetic, large ring magnetic, cutting magnetic and other superb technology and equipment. After years of research and development, we with excellent quality, improve after-sales service, the company's products are exported to Japan, South Korea, Hong Kong and Taiwan and other regions, by the majority of users welcome and trust. With a complete and scientific quality management system, welcome friends from all walks of life to visit, guidance and business negotiations.

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