Neodymium
What is neodymium and where does it come from?
Neodymium is a rare-earth metal used for the most powerful permanent magnets. Discover where it comes from, how it is mined, and why it is indispensable for modern technology and innovations worldwide.
quality
What do N35, N42, N48, and N52 mean?
Discover what N35, N42, N48, and N52 mean for neodymium magnets. Learn how magnet grades are determined, the difference between the various grades, and which magnet is best suited for your application.
Power
How strong is a neodymium magnet?
Neodymium magnets are among the strongest permanent magnets commercially available. Their strength depends on quality, dimensions, shape, and application, not solely on the holding force in kilograms.
Gauss and Tesla
What are Gauss and Tesla in magnets?
Gauss and Tesla are units of measurement for magnetic field strength. Tesla is the official SI unit; Gauss is often used in magnet specifications. One Tesla is 10,000 Gauss, and field strength does not directly determine holding force.
holding power
How is the holding force of a magnet determined?
The holding force of a magnet is measured under ideal conditions on a flat steel plate. In practice, material, surface, distance, temperature, and load affect the actual holding force, which is often lower.
operation
How does a magnet work?
Magnets work through an invisible magnetic field that causes attractive or repulsive forces. This principle forms the basis of countless applications, from simple fastenings to advanced technology.
magnetic field
What is a magnetic field?
A magnetic field is the invisible area around a magnet in which magnetic forces are active. The strength of the field determines how materials and other magnets react.
Attraction
Why do magnets attract each other?
Magnets attract or repel each other through the interaction of their magnetic fields. Opposite poles attract each other, while like poles repel each other. This phenomenon forms the basis of magnetism and is applied in countless technical systems
Divest
Why do magnets repel each other?
Magnets repel each other when two like poles, such as two north poles or two south poles, are placed opposite each other. The repulsion occurs because their magnetic fields oppose each other. As the distance decreases, the repulsive force increases.
Loss of strength
Why do magnets lose their strength?
Neodymium magnets lose very little strength under normal circumstances. However, high temperatures, corrosion, mechanical damage, and strong external magnetic fields can lead to partial or permanent demagnetization.
Temperature
What happens to a magnet at high temperatures?
Temperature affects the operation of a magnet because heat disturbs the alignment of magnetic domains. If the maximum operating temperature is exceeded, a magnet can permanently lose strength.
rust
Why do neodymium magnets rust?
Neodymium magnets can rust because the material is susceptible to corrosion. Therefore, they are provided with protective coatings such as nickel, epoxy, or rubber. Damage to this protective layer increases the risk of corrosion, especially in humid environments.
coating
Why do neodymium magnets have a coating?
Neodymium magnets are coated to protect the magnetic material from moisture, corrosion, and damage
production process
How are neodymium magnets made?
Neodymium magnets are made from neodymium, iron, and boron. After extraction, purification, pressing, sintering, grinding, coating, and magnetizing, one of the most powerful permanent magnets in the world is created.
rare earth elements
What are rare earth metals?
Rare earth elements are a group of seventeen chemical elements that are essential for modern technology. Although not exceptionally rare, they are difficult to extract and process.
Curie point
What is the Curie Point?
The Curie point is the temperature at which a magnetic material loses its permanent magnetic properties.
remanence
What is remanence (Br)?
Remanence (Br) is the amount of magnetism remaining in a material after an external magnetic field has been removed.
coercivity
What is coercivity (Hc)?
Coercivity (Hc) indicates how well a magnet resists demagnetization. Materials with high coercivity retain their magnetic properties better at high temperatures and under the influence of strong external magnetic fields.
BHmax
What does BHmax mean?
BHmax is the maximum energy product of a permanent magnet material. It indicates how much magnetic energy a magnet can store and deliver.
choice
Which magnet should I choose?
The choice of a magnet depends on the application, required holding force, environment, temperature, and desired dimensions.
rust
Why do neodymium magnets rust?
Neodymium magnets can rust because they contain iron. That is why they are almost always provided with a protective coating such as nickel, epoxy, rubber or plastic.
to install
How do you mount a magnet?
Magnets can be mounted in various ways, including self-adhesive, with a screw hole, countersunk hole, pot magnet constructions, or bonding.
non-magnetic materials
Can magnets work through wood, glass, and plastic?
Magnets can work through wood, glass, plastic, cardboard, and other non-magnetic materials.
Out of order
Can magnets be used outdoors?
Magnets can be used outdoors, but not every version is suitable for this. Epoxy-coated, rubber-coated and plastic-encased magnets offer extra protection against moisture, corrosion and weather influences.
Pot magnets
Why are pot magnets so strong?
Magnets can be used outdoors, but not every version is suitable for this. Epoxy-coated, rubber-coated, and plastic-encased magnets offer extra protection against moisture, corrosion, and weather influences.
pot magnets
What is a magnetic dispenser?
A magnet dispenser is a tool that allows small neodymium magnets to be easily removed one by one from a stack. This enables magnets to be processed faster, more safely, and more accurately during assembly or production processes.
