Neodymium Boron Magnets

Key Features of Neodymium Boron Magnets

Superior Magnetic Strength

NdFeB magnets exhibit remarkable magnetic strength, surpassing that of traditional magnets such as ferrite or alnico.

High Energy Density

With a high energy product, NdFeB magnets provide exceptional magnetic power relative to their size.

Wide Range of Grades

NdFeB magnets are available in a wide range of grades, each offering specific magnetic properties suited to different application requirements.

Excellent Temperature Stability

Despite their high performance, NdFeB magnets exhibit good temperature stability, maintaining their magnetic properties across a broad temperature range.

Physical Characteristics

Boiling Point: N/A

Vapor Pressure: (mm Hg.) N/A

Vapor Density: (air = 1) N/A

Specific Gravity: 7.1 - 7.6

Melting Point: Above 1000 Degrees C (1832 Degrees F)

Evaporation Rate: N/A

Odor: No Odor

Solubility in Water: Not Soluble

Appearance: Silver-Gray dark metallic

Fire and Explosion Hazard Data

Flash Point: N/A

FLAMMABLE LIMITS: N/A

LEL: N/A

UEL: N/A

Extinguishing Media: Dry Chemicals without Oxygen Compounds or Sand

Special Fire Fighting Procedures: Do not use Halon agents or water on smoldering, burning powder.

Unusual Fire and Explosion Hazards(s): Dry powders of neodymium magnets will oxidize, smolder, and burn rapidly in the presences of air or oxygen. Maintain powders in water slurry or in inert atmospheres of nitrogen or argon to prevent spontaneous combustion. Magnets may spark on impact. Handle carefully in explosive atmospheres.

Benefits of Using Neodymium Iron Boron Magnets

Strong Magnetic Force

NdFeB magnets are the strongest type of permanent magnets available commercially. They can generate extremely high magnetic fields, making them ideal for applications where a strong magnetic force is required. From powering precision machinery to enhancing the performance of magnetic resonance imaging (MRI) equipment, their strength is a cornerstone in technological advancement.

Compact Size and Lightweight

Despite their strong magnetic force, neodymium magnets are relatively small and lightweight. This makes them suitable for applications where space and weight are crucial considerations, such as in compact electronic devices and modern industrial applications.

Versatile Applications

NdFeB magnets find widespread use in various industries, including electronics, automotive, medical devices, renewable energy, and more. In everyday products like headphones, electric motors, sensors, speakers, and generators, NdFeB magnets deliver enhanced performance, underlining their adaptability in modern technology.

High Resistance to Demagnetization

NdFeB magnets have excellent resistance to demagnetization. This attribute ensures that these magnets maintain their magnetic properties over extended periods, contributing to their durability and reliability. Industries relying on long-term magnetization, such as manufacturing and energy, benefit significantly from this stability.

Energy Efficiency

Due to their strong magnetic force, NdFeB magnets contribute to increased energy efficiency in many applications. For example, in electric motors and generators, they enable the creation of more compact and efficient designs, resulting in improved overall energy performance aligning with the global push toward sustainable and resource-efficient technologies.

Custom Magnet Manufacturer

Custom magnetization allows for the production of magnet products tailored to meet precise size, shape, and magnetic property requirements specified by customers. Basic dimensions, including length, width, thickness, and shape (e.g., round, square, bar), serve as reference points for customization. Custom magnets offer enhanced adaptability and performance, ensuring optimal suitability for diverse applications. Below are parameters for several frequently requested custom magnets.

Surface Treatments for Neodymium Magnet Material

Painting, coating, or plating is generally recommended for NdFeB, although recently certain grades have been made that exhibit higher resistance to oxidation.

Plating NdFeB is a difficult process, and commercial plating houses unfamiliar with the specialized plating techniques required are unlikely to be able to achieve plating with good adhesion on Neo magnets.

Nickel, zinc, or tin plating provides good corrosion resistance for NdFeB magnets, though longer lead times or higher volumes may be required for these. Neo magnets can also be plated using ion vacuum deposition (IVD) techniques. This specialty plating is very controllable for thickness and has excellent adhesion to the material.

A variety of organic coatings have also been successfully developed for NdFeB, exhibiting good corrosion resistance characteristics. For especially harsh environments, it may be advisable to use a combination of coating techniques, or to encapsulate the material in a sealed housing.

Neodymium Boron Magnets Applications

There is a risk of chipping or breaking the magnets because all magnets are inherently brittle. The Neo magnets are less brittle than SmCo. It is advised to not put magnets in conditions of mechanical stress e.g. in load-bearing situations.

Manufacturing

In general, the elements are melted together and milled into a powder that is dry-pressed to shape in the presence of a magnetic field. The material is then sintered, ground to dimension, magnetized, and tested.

They are called "rare earth" magnets because the elements of neodymium are classified as such in the lanthanides section of the Periodic Table of the Elements.

Tolerances

For as-pressed material, tolerance on the thickness (direction of magnetization) is +/– .005". Other dimensions are +/– 2.5% or +/– .005", whichever is greater. According to International Magnetics Association (IMA) standards, visual imperfections such as hairline cracks, porosity, and minor chips are commonly found in sintered magnets. A chipped edge is considered acceptable if no more than 10% of the surface is missing. Cracks are acceptable as long as they do not extend across more than 50% of the pole's surface.

Magnetizing and Handling

Neodymium magnets are very brittle and very strong magnetically. Therefore, it is crucial to handle these magnets with extreme care to avoid personal injury and damage to the magnets. Fingers can be severely pinched between attracting magnets. Magnets can chip if allowed to "jump" at an attracting object. It is highly recommended that when constructing rare earth magnetic assemblies, they be magnetized after assembly. These magnets are NOT for children.

Machining

Since Neodymium is prone to chipping and cracking, it does not lend itself to conventional machining methods. It can, however, be abrasively ground before being plated, but only with the use of liberal amounts of coolant. The coolant minimizes heat fracturing and the risk of fires caused by oxidized grinding dust.

How To Handle Neodymium Magnets Safely

Wear gloves

Given the risk of pinching and sharp edges, wearing gloves when handling neodymium magnets is an essential precaution. Gloves provide a protective barrier, reducing the likelihood of injuries, mainly when working with multiple magnets or handling broken pieces.

Exercise caution

When dealing with strong neodymium magnets that attract forcefully, you should exercise caution when separating them. Sudden movements can lead to unexpected jumping or snapping together, posing risks of pinching or crushing. Use a deliberate and controlled approach when handling magnets to avoid accidents.

Keep away from children

Neodymium magnets cause a significant risk if ingested, particularly by children. Due to their small size and attractive nature, there is a risk of accidental ingestion. In addition, you should continually educate children about the potential dangers of handling these magnets and ensure they are stored in a location inaccessible to young children.

Tips on How to Purchase Neodymium Magnets

Grade

There are several grades of neodymium magnets, ranging from N35 to N52. The higher the number, the stronger the magnet. Consider your specific application requirements and choose the appropriate grade accordingly.

Size and Shape

Neodymium magnets are available in different sizes and shapes, including discs, blocks, spheres, and cylinders. Make sure that the size and shape you choose are appropriate for the purpose you intend to use them for.

Coatings

Neodymium magnets are prone to corrosion, so they are often coated with nickel, zinc, or epoxy to protect them. Depending on your application, choose a suitable coating that provides the necessary protection.

Neodymium Magnet Safety Considerations

Magnetization

Neodymium contains an incredibly strong magnetic field, so it can be dangerous if it comes into close contact with certain objects. A neodymium magnet can disrupt many kinds of electronic equipment, with a range of repercussions.

Do not get it close to people with a pacemaker or other implanted device, as the magnetic field could interfere with the device, causing serious effects on health and safety.

When storing, keep neodymium magnets away from items such as hard drives, disks, and videotapes. Neodymium magnets can also interfere with navigational devices, including compasses. The effects of strong magnetic fields on navigation is one reason these magnets are typically transported via ground.

Jumping

Neodymium magnets are strongly attractive, even from several inches away. The force is powerful enough to pinch skin and cause bodily injury. Depending on the size of the magnet, it could break a finger.

If swallowed accidentally, these magnets have attracted across the membrane of intestines and other organs, causing severe damage and even death.

Wear gloves to protect against pinching hazards, and use spacers (plastic, wood, or cardboard) when separating magnets for storage and shipping. Keep magnets away from children.

Breakage

Wear eye protection to avoid damage to the eyes. There is a high risk of breakage due to the brittle nature of neodymium. When two magnets are drawn quickly together, the force can chip or shatter the magnet. These flying shards and fragments then pose a danger to handlers and bystanders.

Flammability

The dust or powder from a neodymium magnet is highly flammable. Avoid mechanically damaging the magnet, such as by drilling or grinding, in poorly ventilated areas. The resulting dust may easily combust.

Corrosion

Uncoated Neodymium magnets are subject to corrosion in humid environments, which will reduce the strength of the magnet. Some common coatings that prevent against corrosion include nickel/copper/nickel, epoxy and parylene.

Hot Tags: neodymium boron magnets, China neodymium boron magnets manufacturers, suppliers, factory, neodymium magnet 20x6x2, magnets for necklaces, 6 inch neodymium magnet, ndfeb permanent magnets, strong ring neodymium magnet