Neodymium magnets (also known as NdFeB magnets) are widely used in everyday life due to their excellent magnetic capabilities. They are used in a variety of devices and industries, including computer hard drives, MRIs, electric vehicles, industrial permanent magnet motors, mobile phones, stereos, copiers, scanners, video cameras, still cameras, refrigerators, televisions, and air conditioners, among others.
So how to choose a neodymium magnet? How to judge the quality of a neodymium magnet?
These questions come across to many people, especially those who are new to the world of neodymium magnets. In this article, we'll cover a few factors you should keep in mind when choosing a neodymium magnet.
1. Temperature
In general, a decrease in temperature has little effect on the performance of magnets, but they are very sensitive to an increase in temperature. Every magnet has a maximum temperature it can withstand, and neodymium magnets are no exception.
If the temperature of the environment in which it operates exceeds this temperature, the neodymium magnet may demagnetize, reducing its performance. Therefore, when purchasing a neodymium magnet, it is best to ensure that the temperature of its working environment is not higher than the temperature it can withstand.
2. Coating
Neodymium magnets have poor corrosion resistance, so plating is generally required to prevent corrosion. So what are the common coatings of NdFeB magnets? The coatings of NdFeB magnets generally include nickel, copper, chromium, gold, black zinc, blue and white zinc, epoxy resin, etc.
Depending on the coating, the color of the magnet surface will vary, the corrosion resistance will vary, and the service life will vary. Therefore, when purchasing a magnet, different coatings can be selected according to the working environment of the magnet. If the working environment of the neodymium magnet is relatively harsh, you can choose a more corrosion-resistant coating, such as polymer materials and epoxy resin, and vice versa.
3. Magnetic
Neodymium magnets are one of the strongest magnets available and offer exceptional magnetic strength. Their magnetic force can be measured by the magnetic energy product (BHmax), and a high BHmax value means stronger magnetic force.
However, it should be noted that the magnetic force of neodymium magnets is not as strong as possible. Generally, a project needs a neodymium magnet with suitable magnetic force, too strong or too weak magnetism will affect the normal operation of the project.
Therefore, when purchasing a neodymium magnet, it is best to ensure that its magnetic force is within the magnetic force range required for the project.
4. Dimensional tolerances
The actual use of NdFeB permanent magnets has a variety of shapes, such as disc, cylinder, cylinder (with inner hole), square, square column, tile, sector, trapezoid, polygon and various irregular shapes. wait. Various shapes of NdFeB permanent magnets have different shapes and sizes, so it is difficult to form them at one time during the production process.
A qualified neodymium magnet must not only meet performance standards, but also have acceptable dimensional tolerances. If you are buying a magnet for a precision instrument, then you need to pay more attention. The dimensional tolerance requirements of neodymium magnets for precision instruments are relatively strict. Otherwise, the size is too large to fit into the device.
Conclusion
Thank you for reading our article, we hope it helps you better understand how to choose a neodymium magnet. If you want to know more about neodymium magnets, you can visit our official website!
XHMAG is the world's leading manufacturer of neodymium magnets, we provide customers with high-quality neodymium magnet products at very competitive prices.
If you are looking for a neodymium magnet manufacturer, then you can contact us, we will provide you with a satisfactory quotation!
