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How do I grind up demagnetized neodymium magnets? Answered

I need to know so I can do a project oh and I cant think of a way aside from using a blender

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mpilchfamily
mpilchfamily

Best Answer 7 years ago

Don't use a blender. Just smash them with a hammer. Once you get rid of the chrome coating on them they shatter pretty easily.

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nerd7473
nerd7473

Answer 7 years ago

but what if I want a powder of neodymium?

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mpilchfamily
mpilchfamily

Answer 7 years ago

A hammer will do it. They are very brittle and will turn to powder on there own. Think of the magnets like a chunk of compressed wet sand. It can hold it's shape well, but when you crush it it breaks back up very easily.

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nerd7473
nerd7473

Answer 7 years ago

I threw it into a fire to demagnetize it

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iceng
iceng

Answer 7 years ago

That is silly !

An iron magnet will loose its magnetism in a fire

   But

it will regain its magnetism when it cools back down.

Dont throw ceramic into a fire, sharp slivers can violently break off and pierce your face.

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mpilchfamily
mpilchfamily

Answer 7 years ago

What's silly? Heating a Neodymium magnet till it looses it's magnetic strength?

I'll agree it's kind of silly to demagnetize it. Don't really see the point in collecting the demagnetized dust. If you have a good use for it let me know. I have a stack of HDD magnets nearly 2 feet long sitting at home. I used a heat gun to soften the glue and remove them from there metal plates. Also banged them around quite a bit both heated and not to remove them. So some of them are pretty weak right now. Be nice to find a project for the weaker ones. The strong ones may go into a DIY generator build some time in the future.

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iceng
iceng

Answer 7 years ago

Some NIB magnets loose their magnetic field when cooled below their
negative Curie point ...

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nerd7473
nerd7473

Answer 7 years ago

that is interesting to know

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nerd7473
nerd7473

Answer 7 years ago

I don't think it is silly it worked I have the magnet right here it is cold and demagnetized I will re-magnetize the magnet "dust" later for the experiment.

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mpilchfamily
mpilchfamily

Answer 7 years ago

To make a good magnet you will need to heat the material and send a small electric current through it to help re align the atoms. Then when it's cool again you send a large current through it to give it a good magnetic field. It will be very hard to do this to the dust. It would be better to leave them magnetized then crush them. Sure it's hard to work with but you'll maintain a good strong magmatic field. Nothing like you'll be able to create at home.

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nerd7473
nerd7473

Answer 7 years ago

I have plenty of magnets I can just take another big one to the grinder until I have enough for the experiment it is an interesting experiment concerning magnetic fields

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iceng
iceng

Answer 7 years ago

Looking forward to that instructable..

A

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nerd7473
nerd7473

Answer 7 years ago

I threw the magnet inside a can into a fire and am currently using a grinder to make a fine powder because the hammer didn't work as well as I wanted to

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first4magnets
first4magnets

7 years ago

Hi. We always advise people not to drill, grind or machine neodymium magnets as neodymium powder can be highly flammable. When neodymium magnets are manufactured they are machined using diamond edged, water-cooled machining tools.

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BFeely
BFeely

Answer 5 years ago

Here's why: https://www.youtube.com/watch?v=Jy9qG81gx4M

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nerd7473
nerd7473

Answer 7 years ago

ok thanks for the tip I will grind the powder into a bucket of water for safety thanks for the info