Demagnetizing Neodymium magnets in a candle flame?

In summary, demagnetizing Neodymium magnets in a candle flame is done to reduce their magnetic field strength. This is useful for certain applications and is achieved by heating the magnets to cause the loss of magnetic alignment. It is generally safe to do so, but caution should be taken when handling the hot magnet and flame. The time it takes to demagnetize the magnets can vary and they can be re-magnetized afterwards, though this may weaken the magnet over time.
  • #1
itoero
50
0
Is it possible to partly demagnetize neodymium magnets in the flame of a candle?
Those magnets are made up of Neodymium, Iron and Borium.
They have a Nickel-Copper-Nickel coating.
The Curie temperature for Neodymium magnets is 310-400°C.
Neodymium (magnetic powder) burns but does the coating prevent that?
How does Nickel and Copper react to high temperatures?
 
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  • #2
The Curious Temp to
partly demagnetize neodymium magnets
is ~ 80-200°C
I suggest a... boiling party ツ
 

What is the purpose of demagnetizing Neodymium magnets in a candle flame?

The purpose of demagnetizing Neodymium magnets in a candle flame is to reduce their magnetic field strength. This can be useful in certain applications, such as when the magnets are interfering with sensitive electronic devices or when they need to be reset for re-use in a different polarity.

How does the candle flame demagnetize Neodymium magnets?

The heat from the candle flame causes the magnetic domains within the Neodymium magnet to lose their alignment, thus reducing the overall magnetic field strength of the magnet. This process is known as thermal demagnetization.

Is demagnetizing Neodymium magnets in a candle flame safe?

Yes, it is generally safe to demagnetize Neodymium magnets in a candle flame. However, caution should be taken when handling the hot magnet and flame, as both can cause burns. It is also important to ensure proper ventilation to avoid inhaling any fumes from the burning wax.

How long does it take to demagnetize Neodymium magnets in a candle flame?

The time it takes to demagnetize Neodymium magnets in a candle flame can vary depending on the strength of the magnet and the heat of the flame. In general, it can take a few minutes for smaller magnets, while larger magnets may require longer exposure to the flame.

Can Neodymium magnets be re-magnetized after being demagnetized in a candle flame?

Yes, Neodymium magnets can be re-magnetized after being demagnetized in a candle flame. However, the process of re-magnetization may require specialized equipment and expertise. It is also important to note that repeated demagnetization and re-magnetization can weaken the magnet over time.

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