What are Magnets?

Magnets are special rocks or metals. They have a magnetic field. This field is like an invisible force. It can pull some metals towards the magnet. This is called magnetic force.

• Magnets have two ends.
• One end is called the North pole.
• The other end is called the South pole.
• The North pole of one magnet pulls the South pole of another.
• But two North poles push each other away!
• The same is try for two south poles.

This is the same for all permanent magnets.

What Makes a Magnet Strong?

Magnets can be weak or strong. The strength of a magnet is called its magnetic strength. It has:

• Coercivity: How hard it is to make the magnet lose its magnetism.
• Remanence: How strong the magnetic field is.
• Curie temperature: The temperature at which a magnet loses its magnetism.
• Magnetic Flux density: How much force there is.

There are a lot of terms to describe magnets, but they all add up to: how much can this thing pull?

The strongest magnets have:

• High coercivity
• High remanence
• A high magnetic energy product. This is a number that tells you how much energy the magnet can hold.

 The Strongest Magnet: Neodymium!

The strongest type of magnet you can buy is a neodymium magnet. It is also called an NdFeB magnet. This is because it is made of:

• Neodymium (Nd)
• Iron (Fe)
• Boron (B)

These magnets are super strong! They are about 10 times stronger than the old-fashioned ferrite magnets (the black ones you might have on your fridge).

Why are Neodymium Magnets So Strong?

• They have a very high magnetic energy product. The best ones can be over 50 MGOe!
• They have very high coercivity and remanence.
• They have a lot of magnetic anisotropy!

Neodymium magnets are also called rare earth magnets. This is because neodymium is a rare earth element.

We, as a NdFeB Magnets Factory, understand and refine these to get the best results.

Other Types of Magnets

There are other types of magnets, too. But none are as strong as neodymium magnets. Let’s look at some:

• Samarium Cobalt (SmCo) magnets are strong. They can also handle high temperatures. But they are not as strong as neodymium magnets.
• Alnico magnets are good at high temperatures. But they are not very strong.
• Ferrite magnets are the weakest. But they are cheap and don’t rust easily.

Let’s have a look at Magnet Grades, like those available from our Magnet Grade page.:

• Higher numbers mean stronger magnets!

We offer many options of Customized NdFeB Magnets.

What are Neodymium Magnets Used For?

Neodymium magnets are used in many things!

• Electronics: Like in mobile devices and hard disk drives. These contain magnetic recording media.
• Audio Equipment: Like in speakers and headphones. These need strong speaker magnets to work well .
• Electric motors: Like in cars and wind turbines. Wind Turbines use neodymium magnets in wind power generation. One wind turbine can use 2 tons of NdFeB magnets!
• MRI machines: These use very strong magnets to take pictures inside your body. This is Magnetic Resonance Imaging!
• Magnetic levitation trains: These trains float above the tracks! Maglev trains are super fast .
• Toys: Many toys use magnets to make them fun!
• Household Appliences: Neodymium is in vacuum cleaners. Strong, small magnets are key for energy-saving motors.
• Power Tools: Magnets make good power tools. This includes handheld tools and gardening power tools .

NdFeB is important to many industries.

How are Neodymium Magnets Made?

Making neodymium magnets is a bit tricky! Here’s how it’s done:

1. Mining: The rare earth elements (like neodymium) are dug out of the ground.
2. Mixing: The neodymium, iron, and boron are mixed together.
3. Melting: The mix is melted in a very hot oven.
4. Casting or Pressing: The hot liquid is poured into a mold, or pressed into shape.
5. Sintering: The molded magnet is heated again. This makes it very hard.
6. Machining: The magnet is cut and shaped to the right size.
7. Coating: The magnet is covered with a special coating. This stops it from rusting. Common coatings include:
   • Nickel
   • Copper
   • Gold

Magnet coating is very important! You can read more about it on our Magnet Coating page!

Buying Neodymium Magnets: What to Look For

If you want to buy neodymium magnets, here are some things to think about:

• Grade: Choose the right grade (like N35 to N52). Higher numbers are stronger, but also cost more.
• Size and Shape: Magnets come in many shapes, like:
  • Discs
  • Blocks
  • Rings
  • Spheres (like neodymium ball magnets).
• Coating: Pick a coating that will protect the magnet.
• Temperature: Make sure the magnet can handle the temperature you need.
• Cost: Neodymium magnets cost more than other types, but they are worth it for their strength.

We can create Custom Neodymium Magnets for your needs.

Safety with Strong Magnets

Neodymium magnets are very strong. Be careful with them!

• Keep them away from:
  • Children
  • Credit cards
  • Computers
  • Other electronic devices
• Don’t put two strong magnets close together. They can snap together and pinch your fingers!
• Don’t try to drill or cut neodymium magnets. They can break and make sharp pieces.

The Future of Magnets

Scientists are always trying to make even stronger magnets!

• Some are looking for new materials to use.
• Others are trying to make magnetic nanocomposites. These are tiny magnetic particles mixed together.
• Some are even working on magnetocaloric materials. These get cold when a magnetic field is applied. This could be used for magnetic refrigeration.

 Conclusion: Neodymium is King!

Neodymium magnets are the strongest magnets in the world. They are used in many things, from phones to cars to MRI machines. If you need a strong magnet, neodymium is the best choice! We at Neodymium Magnets Factory can provide you with the best NdFeB magnets for your needs. Check out our selection today!