Ningbo Ketian Magnet CO.,LTD.
Ningbo Ketian Magnet CO.,LTD.

How to Judge the Quality of Sintered NdFeB Magnets?

Apr 01 , 2024

As a high-performance permanent magnet material, sintered NdFeB magnets are widely used in motors, sensors, wind power generation and other fields. However, the quality of sintered NdFeB magnets on the market varies, making choosing high-quality products a challenge faced by both consumers and manufacturers. This article will help you judge the quality of sintered NdFeB magnets through four aspects of analysis.

Comprehensive consideration of performance indicators

The quality of sintered NdFeB magnets is first reflected in its performance indicators. Magnetic field strength, coercivity, and remanence are key indicators of magnet performance. Magnetic field strength reflects the magnet's ability to generate a magnetic field, and high-quality magnets should have higher magnetic field strength. Coercivity is the ability of a magnet to resist interference from external magnetic fields. High-quality magnets usually have higher coercivity and can maintain stable magnetic properties in harsh environments. Residual magnetism refers to the magnetism retained by the magnet when there is no external magnetic field. High-quality magnets should have a higher residual magnetism value.

Appearance quality and defect detection

Appearance quality is an intuitive basis for judging the quality of sintered NdFeB magnets. A high-quality magnet should have a smooth surface with no obvious cracks, pores, or inclusions. In addition, the dimensions and tolerances of the magnets should also meet specification requirements. During the production process, strict defect detection is also required, such as magnetic detection, laser scanning surface defect detection, etc., to ensure that there are no defects inside the magnet and improve the overall quality of the product.

Production technology and raw material selection

The selection of production processes and raw materials has a decisive impact on the quality of sintered NdFeB magnets. High-quality magnets should adopt advanced production processes to ensure that the magnets have uniform composition and fine grains, thereby improving magnetic properties. At the same time, the selection of raw materials is also crucial. High-quality raw materials should have the characteristics of high purity and low impurity content to ensure the stability and durability of the magnet.

In short, judging the quality of sintered NdFeB magnets requires comprehensive consideration from multiple aspects such as performance indicators, appearance quality, production technology, and raw material selection. When selecting products, consumers and manufacturers should pay attention to these key factors to ensure that they purchase high-quality sintered NdFeB magnets that meet the needs of practical applications. At the same time, for manufacturers, only by continuously improving product quality and innovation capabilities can they remain invincible in the fierce market competition.

When choosing sintered NdFeB magnets, consumers and manufacturers should also pay attention to the product's application fields and special requirements. Different application scenarios may have different performance and quality requirements for magnets, so selection needs to be made based on actual conditions. In addition, with the continuous advancement of science and technology and the continuous development of the market, the quality and performance of sintered NdFeB magnets are also constantly improving. In the future, more high-performance and high-quality products will be available to provide strong support for the development of various fields. .

Ketian Magnet as a professional NdFeB magnet supplier is extensively used across diverse sectors globally, including electric vehicles, automotive, household appliances, industrial automation, acoustics, IT products, medical equipment, and wind turbines. Renowned for its reliability, Ketian Magnet's products such as custom neodymium magnets are exported worldwide and are trusted by customers across Europe, America, Asia, and China.