What are the uses and functions of magnets?

Understanding the purpose and function of various magnets is very important for enterprises. You can make full use of the characteristics of different magnets and can better improve product performance.

1. The history of magnets:

Magnets are not invented by humans, they are natural magnetite. The ancient Greeks and the Chinese discovered a natural magnetized stone in nature, called it "magnetite". This kind of stone can magically suck up small pieces of iron, and always point in the same direction after swinging randomly. Early seafarers used this magnet as their compass to distinguish directions at sea. The early discovery and use of magnets should be Chinese, that is, the use of magnets to make "compasses" is one of China's four major inventions.

Second, the composition of the magnet

The components of the magnet are atoms such as iron, cobalt, and nickel. The internal structure of the atoms is special, and they have magnetic moments. Magnets can generate magnetic fields and have the property of attracting ferromagnetic substances such as iron, nickel, cobalt and other metals.

3. Types of magnets

Shape magnets: square magnets, tile magnets, shaped magnets, cylindrical magnets, ring magnets, disc magnets, bar magnets, magnetic frame magnets, attribute magnets: samarium cobalt magnets, neodymium iron boron magnets (strong magnets) , Ferrite magnets, aluminum nickel cobalt magnets, iron chromium cobalt magnets, industry magnets: magnetic components, motor magnets, rubber magnets, plastic magnets and so on. Magnets are divided into permanent magnets and soft magnets. Permanent magnets are added with strong magnetism, which aligns the spin of the magnetic substance with the angular momentum of electrons in a fixed direction, and soft magnetism is added with electricity. (It is also a method of adding magnetic force) Waiting for the current to remove the soft iron will slowly lose its magnetism.

Fourth, the use of magnets

Magnets are widely used in industries such as industry, medicine, astronomy, and military. Here are the uses of various magnets:

1. NdFeB permanent magnet

NdFeB permanent magnets are modern permanent magnets with strong applications and are widely used. It is mainly used in various fields such as electroacoustics, permanent magnet motors, communications, automotive electronics, magnetic machinery, aerospace, computers, household appliances, medical equipment, office automation, toys, packaging boxes, leather products, magnetic jewelry and so on.

2. Permanent Ferrite

Permanent ferrite is used as a constant magnet in electric meters, generators, telephones, speakers, televisions and microwave devices. It is also used in recorders, pickups, speakers, and magnetic cores of various instruments. It is used in radar, In communication, navigation, telemetry and other electronic equipment.

3. Smco magnet

The working temperature of samarium cobalt magnet can be as high as 300 degrees, and it has corrosion resistance and oxidation resistance. At present, it has been widely used in detectors, generators, radar, instruments, and other precision technology fields.

4. Alnico magnet

Alnico magnets are resistant to high temperature and corrosion. They are mainly used in motors, sensors, medical instruments, hand tools, tweeters and various instruments.

5. Rubber magnet

Rubber magnets are divided into the same sex and the opposite sex, and the same sex suction is relatively weak. It is mainly used for publicity (fridge stickers, car stickers, etc.), decorative gifts, refrigerator magnets, toys, teaching materials, etc. The opposite magnets are strong and can be used for small motors and sensors. , Magnetic adsorption supplies, etc.

What are the uses and functions of magnets

Fifth, the role of magnets

(1) Physical function

1. Compass; 2. Attract light and small objects; 3. Electromagnet can be used as electromagnetic relay; 4. Motor; 5. Generator; 6. Electroacoustic; 7. Magnetic therapy; 8. Magnetic suspension; 9. Nuclear magnetic resonance.

(2) The role of diet

1. The magnetic stone tastes salty and calm; it returns to the liver and kidney channels;

2. It has the functions of calming liver and yang, conspicuous ears and eyesight, calming and calming the nerves, and satisfying gas and asthma.

3. Indications: Liver Yang dizziness, palpitations, insomnia, dizziness, tinnitus and deafness, kidney deficiency and asthma.

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