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What is a neodymium Magnet?

Neodymium magnets are a relatively recent contribution to magnet technology. The term “neodymium” is derived from two Greek words: “neos,” which means “new,” and “dymos,” which means “magnet.” Neodymium magnets, also known as neodymium, were created several years ago and have since been extensively employed in various global sectors.

The purpose of our article is to address the question, “What is a neodymium magnet?”, “What may they be used for?” and more questions regarding neodymium magnets. We will begin by describing what a neodymium magnet is first. Read on to learn more.

What Exactly is a Neodymium Magnet?

A neodymium magnet, often known as a neo magnet, is a rare-earth magnet composed of neodymium, iron, and boron. Although other rare-earth magnets exist, such as samarium cobalt, neodymium is the most popular. They generate a stronger magnetic field, allowing for improved performance. Even if you’ve heard of neodymium magnets, there’s likely some information you don’t know about these popular rare-earth magnets.

Neodymium magnets are magnets constructed of neodymium, which has been dubbed the world’s strongest permanent magnet. They can generate magnetic fields of up to 1.4 Tesla to put their power into perspective. Of course, neodymium is a rare-earth element with the atomic number 60. Carl Auer von Welsbach, a chemist, discovered it in 1885. Neodymium magnets were not created until almost a century later.

The Evolution of Neodymium Magnets

General Motors and Sumitomo Special Metals developed neodymium magnets in the early 1980s. The firms found that mixing neodymium with trace quantities of iron and boron resulted in a strong magnet. The world’s first neodymium magnets were then introduced by General Motors and Sumitomo Special Metals, providing a cost-effective alternative to all other rare-earth magnets on the market.

Neodymium Magnet Applications

Because of their unmatched strength, neodymium magnets are a good option for a wide range of commercial applications, including the following:

  1. Neodymium magnets are used as head actuators in computers. Computer hard drives store data on magnetic plates known as platters.
  2. For Headphones and speakers. Neodymium magnets are used to encase the electromagnetic coil in a cylindrical magnet. As a result, when an electric current travels through the coil, the magnet produces sound waves.
  3. For door locks. Because neodymium magnets are strong, they are often employed in mag locks, where the magnet is attached to the doorframe, and the armature is attached to the door.
  4. Magnetic Bearings use Neodymium magnets. Magnetic bearings are found in pumps, compressors, turbines, and generators.
  5. Magnetic Jewelry Clasps. Neodymium magnets are becoming more used in the jewellery business. Magnetic clasps make it simpler for customers to wear and remove jewellery than conventional fastening.
  6. Magnetic Dartboards. Magnetic dartboards employ neodymium magnets. It helps to prevent youngsters from harming themselves with sharp darts and keeps sharp darts from scraping the walls when you miss your aim.
  7. As Wind Turbine Electric Generators
  8. Magnetic Therapy Bracelets Make Use of Neodymium Magnets. According to several accounts, magnetic wristbands offer some therapeutic and stress-relieving capabilities.
  9. Recurrent Acid Reflux Treatment. They are surgically inserted around the lower oesophagal sphincter, a muscular ring at the oesophagus’s end.
  10. In the Magnetic Pin Dish. Magnetic pin dishes provide several advantages. They come in helpful if you have little metallic things that you don’t want to spread all over your desk.
  11. Magnetic Resonance Imaging. Imaging produces comprehensive pictures of human body tissue and structures using magnetism and the huge proportion of water in the human body. These magnets are used for advertising at point-of-sale displays.

What is the Strength of Neodymium Magnets?

Very powerful. Neodymium magnets will wow you! A 2-gram neodymium magnet 8 millimetres (0.315 inches) in diameter and 5 millimetres (0.197 inches) in length produces a force of almost 1700 grams. They are so powerful that they have largely supplanted other kinds of magnets in various applications. Because they are almost ten times stronger than ceramic magnets, you could replace a ceramic magnet with a much smaller neodymium magnet and get the same (or greater!) gripping force. Be cautious: they’re so powerful that even little neodymium magnets may cause serious injury. Larger neodymium magnets have even been known to shatter bones. Handle with caution!

What is the Composition of Neodymium Magnets?

Neodymium magnets are typically composed of neodymium, iron, and boron alloy. The specific composition might vary based on the magnet’s required strength and purpose. Furthermore, Neodymium magnets are manufactured in two ways: sintered and bonded.

Sintered neodymium magnets are created by melting the alloy components in a furnace, then casting the mixture into moulds and cooling it to produce ingots that are crushed into a fine powder and pressed into moulds. Powder moulds are sintered to form dense blocks. (Sintering is the process of compacting and producing a solid mass of material using heat or pressure without melting it completely.) The material is then magnetized after being carved into its final form, coated, or plated.

Bonded neodymium magnets are made of neodymium alloy powder and a polymer binder. The components are pressed or extruded to create more complicated forms and magnetization powders than are generally obtainable in sintered magnets.

Neodymium Magnet Properties

The physical size and shape of the NdFeB magnet and the whole magnetic circuit dictate how effectively a magnet will function at elevated temperatures. For example, a NdFeB magnet in free space will demagnetize at a lower temperature than a similar-sized NdFeB magnet linked to a piece of mild steel. It will also demagnetize at a lower temperature than a NdFeB magnet twice its length in the magnetization direction. The curvature of the intrinsic curve also influences the temperature performance of NdFeB.

As shown on the Intrinsic curve, the working point is determined by the magnetic circuit in which the Neodymium magnet is. With a greater working point (e.g., a magnet coupled to mild steel or a longer magnet), the magnet can withstand higher temperatures before demagnetizing (when the working point crosses the ‘knee’ of the Intrinsic curve). The issue becomes more complicated if an external demagnetizing field is present since the Neodymium magnet may demagnetize at even lower temperatures. As a result, the total environment, the total magnetic circuit, and the application must all be reviewed to determine whether a Neodymium magnet will continue to perform satisfactorily towards the recommended max working temperature as indicated by the letter(s) in its NdFeB grade classification. For example, if the design is poor, a magnet rated for a maximum working temperature of 150 degrees Celsius may begin to demagnetize significantly at 100 degrees Celsius. In contrast, if the design is excellent, a magnet rated for a maximum working temperature of 80 degrees Celsius may begin to demagnetize significantly at 100 degrees Celsius.

Where Can I Buy Bulk Neodymium Magnets?

ROBO Magnetic is one of China’s major neodymium magnet producers, having been in business for 16 years and selling an average of 800 tons of completed neodymium magnets.

ROBO Magnetic places a premium on product quality and customer happiness. We can provide a production component approval report, and all of our goods are ISO 9001:2015 certified.

We are a multinational corporation that serves industrial, commercial, and retail clients all over the globe. Contact us today to learn more about how we can provide you with high-quality neodymium magnets.

FAQs

What Makes Neodymium Magnets So Powerful?

Because of their high saturation magnetization and resistance to demagnetization, neodymium magnets are very powerful. The NdFeB magnet has the significant benefit of allowing you to employ a smaller magnet for the same function as a bigger one. As the total size of the equipment is lowered, the overall cost may be reduced.

What is the Lifespan of Neodymium Magnets?

Suppose the neodymium magnets’ physical qualities stay stable and are not impacted by demagnetizing forces such as high temperature, reverse magnetic field, radiation, and so on. In that case, the flux density loss may be less than 1% in 10 years.

What are the Primary Properties of Neodymium Magnets?

Neodymium magnets are less vulnerable to cracking and chipping than other rare-earth magnetic materials, such as SmCo magnets, and are less costly. However, neodymium magnets are more temperature sensitive. As a result, since their magnetic characteristics are relatively stable at high temperatures, SmCo magnets may be a preferable option for crucial applications.

What Neodymium Magnet Grades and Shapes are Available?

For all forms and sizes of neodymium magnets, grades N30, N35, N38, N40, N42, N48, N50, and N52 are available. ROBO Magnetic offers these magnets in various forms, including disc, bar, block, rod, and ring. Because not all neodymium magnets are featured on this website, please get in touch with us if you do not find what you are looking for. ROBO Magnets can also modify neodymium magnets to fit your specifications. Please give us your particular request, and we will assist you in finding the best cost-effective option for your project.

What is the Best Neodymium Magnet Temperature?

We suggest that neodymium magnets not be utilized at temperatures exceeding 130°C unless the magnetic circuit is carefully designed. However, if you want to employ neodymium magnets above this temperature, please get in touch with us so our experts can discuss your application.

Is Neodymium Magnet Surface Treatment Required?

Yes, the answer is yes. Neodymium magnets may rust in moist environments if they are not protected by a surface coating, such as electroplating.

Conclusion

Thank you for reading our neodymium article; we hope it has helped you better understand the qualities and characteristics of neodymium magnets. If you are interested in learning about neodymium magnets, we suggest you visit ROBO Magnetic.

ROBO Magnetic, a global magnet provider, has been active in neodymium magnet manufacturing and sales for over 16 years. It offers consumers high-quality rare earth permanent magnetic goods and various non-rare earth permanent magnets at very reasonable prices.

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Article by

ROBO Magnetic Product Team

We are the manufacturer with 16 years of experience in custom neodymium magnets.

Need A Quote? Get in touch with us directly.

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