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How does cold affect magnets?

If you want to buy magnets, you must take into account the temperatures at which the magnets are used and whether they can damage them or limit their operation.

If you want to buy magnets, it is very important to pay attention to the operating temperatures. Regardless of the application you need, you must consider the temperatures at which the magnets are used and whether they may damage them or limit their operation. You can use this publication for guidance and general description, but you should still consult trained professionals before you buy.

 

Do cold and heat have the same effect on magnets?

Both have effects on magnets, but in different ways. But let's start from the beginning. Temperature affects the atomic structure of the elements that make up the magnet. When it heats up, the particles in the magnet accelerate. As a result, order and orientation become confused, which weakens the magnetic force and can even dissolve completely. However, the maximum operating temperature is different from one magnet to another. Neodymium magnets, for example, have a relatively low maximum temperature of 80°C, while ferrite magnets lose their magnetic strength at 250°C.

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The cold, on the other hand, can even do the opposite. The particles inside become slower and, therefore, the magnetic force may even be strengthened in some cases. However, it is also important to bear in mind the respective maximum. If we compare ferrite and neodymium magnets in terms of resistance in cold climates, this time neodymium magnets work better and can withstand up to -196°C while ferrite magnets lose their magnetization at -40°C. Then you'll see how important it is to know about operating temperatures before you buy magnets.

 

Experiment on the influence of cold on magnets

You can even observe the influence of temperature on magnets with a simple experiment. Everything you need:

  • A freezer
  • Various clips
  • A glass of water
  • A ferrite magnet

 

And that's how it works:

Fill the container with water and clips, and insert the magnet into the container. Then lift the magnet and count how many clips are attracted to the magnet. Then place the glass in the freezer until the water is almost frozen. Then add the magnet to the glass and put it back in the freezer for about 15 minutes. Now lift the magnet out of the water and compare how many clips are attracted.

Based on these examples, you can see that the magnets are not suitable for either too high or too low temperatures. Depending on the context, the magnetic force at certain temperatures is strengthened.

So, if you're thinking about buying magnets, you'll need to consider the operating temperatures. If you need more information or get out of doubts, just contact us and we will answer you as soon as possible.

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