Isotropic vs. Anisotropic Magnetic Materials: What You Need to Know

What Are Magnets?

Magnets are things that can pull some metals. They have a special power called magnetism. This power comes from tiny, tiny bits inside the magnet, called magnetic domains.

Two Big Kinds of Magnets

We are talking about two kinds of magnets today:

• Isotropic magnets
• Anisotropic magnets These are, Samarium Cobalt, Neodymium magnets, and Alnico Alloys.

Let’s learn what those big words mean!

Isotropic Magnets: The Same All Around!

Imagine a cookie. It’s the same no matter how you hold it, right? Isotropic magnets are like that!

• They are not very strong.
• Their power is the same in every direction.
• They are easy to make. We just squish magnet powder together! (Powder compaction)
• We say (Random crystallographic orientation), which a big way of saying the tiny bits inside are all in the same direction.

What Do We Use Isotropic Magnets For?

• Fridge magnets!
• Toys!
• other stuff around the house (household appliances)

Anisotropic Magnets: Strong in One Way!

Now, imagine a log. It’s strong along its length, but you can break it across, right? Anisotropic magnets are like that!

• They are very strong!
• Their power is strongest in ONE direction. We call this the “magnetization direction.“
• They are harder to make. We have to line up the tiny bits inside (grain alignment). We do this with a big magnetic field! (Magnetic field alignment)
• They have (Directional magnetization)

What Do We Use Anisotropic Magnets For?

• Big motors in electric cars! (Electric Vehicles)
• Big machines that make electricity! (Industrial Motors*, Permanent Magnet Synchronous Generatort**)
• we Find(magnets applications) in (Electric Propulsion Systems),(Powertrain Systems)

We Make NdFeB Magnets!

We are a Neodymium Magnets Factory! We make lots of anisotropic NdFeB magnets. (NdFeB Magnets Factory) These are the strongest magnets you can get!

• We make, (Customized NdFeB Magnets) Customized NdFeB Magnets.
• We make custom shapes and sizes. (Custom Neodymium Magnets) Custom Neodymium Magnets We use (Customized Neodymium Magnets) to power, (Electric Vehicles), (Hybrid Vehicles), for (Autonomous Driving) and (adas).

Let’s Look at a Table!

Here’s a table that shows the difference between the two kinds of magnets:

Why Are Anisotropic NdFeB Magnets So Good?

• They are super strong! They have a big energy product (BHmax).
• They can be small but still powerful!
• They can work even when it’s hot! (Thermal stability)
• They are used in many important machines. There are many (Magnet applications), for example in (Aerospace Engines)

Picking the Right Magnet

If you need a magnet, you need to think about:

1. How strong does it need to be?
2. Will it get hot?
3. What shape do you need?

If you need a very strong magnet, anisotropic NdFeB is the best!

We can help make (Customized NdFeB Magnets) perfect you.

If it must handle high temperatures pick, (N35, N38, N40, N42, N45, N48, N50, N52) N52.

For more Magnetic Resonance Imaging power consider(N33M, N35M, N38M, N40M, N42M, N45M, N48M, N50M) N50M.

If you want higher stability you should look at, (N30H, N33H, N35H, N38H, N40H, N42H, N44H, N46H, N48H) N48H.

We Make Great Magnets!

• We have been making magnets for a long, long time!
• We are very good at it!
• We make sure our magnets are perfect! (ISO 9001 certification)

More About Magnets!

Magnets have two poles: a North pole and a South pole. The North pole of one magnet pulls the South pole of another magnet. But, the North pole pushes away another North pole! This pushing and pulling is called magnetic force or ferromagnetic attraction.

Magnetic Field

The power of a magnet goes out around it. This is called the magnetic field. The stronger the magnet, the bigger the field!

Keeping Magnets Strong

Magnets can lose their power. This can happen if:

• They get very, very hot.
• They get hit very, very hard.
• They are near other strong magnets.

We make our NdFeB magnets so they stay strong for a long, long time! (Demagnetization resistance)

Coating Our Magnets

Raw, (neodymium magnet), (neodymium permanent), (Permanent Magnet) will rust. NdFeB magnets can rust. We put a special coating on them to stop the rust! This is called Magnet Coating. We can use:

• Nickel
• Epoxy
• Even gold! (gold magnetic)

This coating keeps the magnets shiny and strong! We can even supply (PTFE Coating) and (Teflon Coating).

Magnets in Lots of Things!

You might be surprised where you find magnets!

• Electric guitars: They help make the sound! (electroacoustic devices)
• Computers: They help store information! (Data Storage)
• Speakers: They make the sound you hear! (speaker, speaker magnet)
• Phones We make (customized ndfeb) and (magnets applications) for (Mobile Devices) and (Consumer Electronics) electronics! we find them in (wind turbine)(wind power) and *wind power generation)wind power.
• Trains: Some very fast trains use magnets to float above the track! (Magnetic levitation (Maglev))
• (Medical devices) like, (Magnetic Resonance Imaging), (MRI)

More Cool Magnet Words!

• Coercivity: How hard it is to make a magnet lose its power.
• Remanence: How strong the magnet stays.
• Curie temperature: The temperature where a magnet loses ALL its power! We have (magnetic modules) and (magnetic systems). We carry (neodymium ball magnets), and (magnetic sheet).

  Making Magnets: Step-by-Step

Here’s how we make our amazing NdFeB magnets:

1. Mix: We mix the special metals together (Neodymium Iron Boron (NdFeB)).
2. Melt: WE can also use **Samarium cobalt.
3. Crush: We grind it into a fine powder.
4. Press: We squish the powder in a very strong magnetic field. This makes it anisotropic! (Pressing direction, Isostatic pressing)
5. Sinter: We heat it up (Sintering process). This makes it hard and strong. (Sintered magnets)
6. Shape: We cut and grind it to the perfect shape! (Complex anisotropy)
7. Coat: We put on the special coating to protect it.
8. Magnetize: We give it its final, super-strong magnetism!

Important Standards We Follow

We make sure our magnets are safe and good! We follow these rules:

• ROHS 
• REACH 
• ISO 9001

Questions You Might Have