Ball Magnet Properties

Ball Magnet Properties

A ball magnet is a spherical magnet made of magnetic materials such as neodymium iron boron (NdFeB), ferrite (Ferrite) and aluminum nickel cobalt (AlNiCo). Its magnetic properties are very outstanding, so it is widely used in the fields of electronics, aerospace, aviation, instrumentation, machinery manufacturing and medical treatment. Below we will briefly introduce the performance of ball magnets from two aspects of magnetic properties and applications.

1. Magnetic properties

1. Magnetic energy product
Magnetic energy product is one of the important indicators of magnetic materials, which represents the magnetic energy stored in the material. Spherical magnets have a very high magnetic energy product and are currently one of the strongest permanent magnet materials. The magnetic energy product can reach more than 400kJ/m³. This makes the ball magnet have very great application potential in the fields of electronics, computer, communication and so on.
2. Remanence and coercive force
The greater the remanence, the greater the amount of magnetic flux the material retains after magnetization. The coercive force is the minimum magnetic field strength required to magnetize the material. The greater the coercive force, the harder it is to magnetize the material and the higher the remanence. The coercive force of the ball magnet is relatively high, which can reach more than 12kOe, and the remanence can reach more than 13.5kGs. This makes ball magnets widely used in fields such as motors, electronic devices, and medical equipment.
3. Working temperature
Ball magnets need to consider their working temperature during use. Different materials have different sensitivities to temperature, and the maximum working temperature of ball magnets is generally between 80-200°C. Since the ball magnet has a high magnetic energy product and coercive force, it can maintain its stable magnetic properties without being disturbed by an external magnetic field, and has a wide range of applications.

2. Application field

1. Electronics
Ball magnets are widely used in electronic devices, such as power supplies, stepper motors, DC motors, automotive motors, etc. The high magnetic energy product and coercive force of ball magnets can improve the performance of various motors, and because ball magnets have sufficient strength and flexibility, they are also widely used in electronic equipment such as computers and communications.
2. Machinery
Ball magnets are widely used in machinery manufacturing, such as magnetic adsorption robots, magnetic clips, magnetic seals, etc. In these applications, ball magnets can generate strong magnetic force, realize various magnetic force control and magnetic static observation, and provide many conveniences for mechanical production, manufacturing and processing.
3. Aerospace
In the field of aerospace, as a very important permanent magnet material, the performance of spherical magnets has been fully applied and exerted. The following are the main applications of ball magnets in the aerospace field:

Azimuth control system
In the orbit of the earth, the spacecraft needs to fly according to a certain orbit and angle, which requires a very accurate orientation control system to help the spacecraft control its steering and attitude. Spherical magnets can be used to manufacture magnetic gyroscopes in azimuth control systems. This magnetic field gyroscope uses the powerful magnetic properties of spherical magnets to control the orientation and attitude of spacecraft. This kind of gyroscope does not need rotating parts like traditional mechanical gyroscopes, so it has higher reliability, and the ball magnet itself will not produce friction and wear, and has a longer service life.
electric motor
In spacecraft, electric motors are used to control the rotation of propellers or other devices. Ball magnets can be applied to various motors in spacecraft, because of their high magnetic energy product and coercive force, they can improve the torque and efficiency of the motors. The ball magnet can work normally in the high temperature and vacuum environment of the spacecraft, its performance is stable and reliable, and it is suitable for the use of various high-tech devices.

Magnetic control system
In a spacecraft, a magnetic control system is required to control the orientation and attitude of the spacecraft. Ball magnets have high magnetic force and azimuth control capabilities, so they can be used as an important part of the magnetic control system. Ball magnets can be used in magnetic valves, magnetic bearings, magnetic deflectors and other devices, which can realize various attitude control and acceleration control of spacecraft.
Sensors and Detectors
Ball magnets are also widely used in aerospace probes and sensors, such as magnetometers, magnetic field detectors, magnetic sensors, and so on. These devices are used to detect and measure the magnetic field strength around the spacecraft, using the powerful magnetic properties of spherical magnets to improve the sensitivity and measurement accuracy of the sensors. In addition, ball magnets can also be used in magnetic bubble memory, which is of great significance in space research and computer industry.
In general, spherical magnets are widely used in the aerospace field. Their strong magnetic properties and stable performance can provide support for various devices and equipment of spacecraft, improve the reliability and innovation of aerospace technology, and provide human exploration He has made important contributions to the universe and the development of science and technology.

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