How do you permanently magnetize something?

Discussion in 'Off Topic' started by SSSnail, Mar 17, 2009.

  1. SSSnail

    SSSnail Lifer

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    With available household tools, or not too difficult to acquire? From googling around, I found a few ways, but none are too practical and most are non-permanent.

    Come on ATOT scientists, do me proud.
     
  2. jagec

    jagec Lifer

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    Get a magnet. Get your ferrous object. Slide the magnet along the ferrous object, always going in the same direction, always with the same part of the magnet and the object.
     
  3. DLeRium

    DLeRium Lifer

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    That's not permanently magnetizing if it's like paper clips. You probably need something extremely strong to align the domains at a low temp.

    What you need is heat, lots of it. When you heat something up you can get the domains to align a certain way. Cool it down and you get a magnetized material that stays that way.
     
  4. theflyingpig

    theflyingpig Banned

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    Lots and lots of heat. More heat than you have ever felt in your entire life will be needed. Remember this.
     
  5. SSSnail

    SSSnail Lifer

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    So my BBQ grill won't do right? I have a blow torch. :D

    I didn't think the directions for creating a magnet would be "Heat oven to really freaking high, bake for 2 hours"...
     
  6. IGBT

    IGBT Lifer

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    ..I'm looking for a non ferrous metals magnet.
     
  7. DLeRium

    DLeRium Lifer

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    Well no, I don't know how well you can align the domains in heat. When you apply a magnetic field to a ferromagnetic material above the Curie temperature you will be experiencing a paramagnetic/ferromagnetic effect. But iono. You have a better chance at realigning domains at a higher temperature though.
     
  8. WHAMPOM

    WHAMPOM Diamond Member

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    You have to liquify the metal and fast cool it in a strong magnetic field?
     
  9. Cerpin Taxt

    Cerpin Taxt Lifer

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    1.) Aquire strong magnet, desired object, & super glue (or epoxy)
    2.) Glue magnet to object.
    3.) Profit!
     
  10. silverpig

    silverpig Lifer

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    AFAIK heat is both your friend and enemy when trying to magnetize something. Heat will randomize the domains, but also make them easier to change direction.

    I guess what you want is a really strong magnet, a lot of heat, and heat your metal up good in the magnetic field, then cool it slowly while keeping the field on.
     
  11. soccerballtux

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    Lol cerpin.....

    If you wrap a wire all along the thing you want to magenetise, heat it up (maybe in on-its-way-to-boiling-temp water?), and touch the wires to a battery shortly, you'll get it magnetized. I think if you periodically touch the wire to the battery (take it off after touching it a half second) until the object is cooled, that should ensure the magnetic domains that you create stay there. IIRC, you lose them when you heat it up or drop the magnet, and keep them during cooling; but I'd continue tapping the wires while it cools just to make sure.
     
  12. alkemyst

    alkemyst No Lifer

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  13. lokiju

    lokiju Lifer

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  14. wwswimming

    wwswimming Banned

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    i used to work at Litton Electron Devices, who makes their own magnets, and
    even ended buying one of their old magnetizing machines, just to take it apart.

    basically you need a material that can be magnetized and a device that can
    create a humongous magnetic field.
     
  15. randay

    randay Lifer

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    you cant permanently magnetize anything, because you can demagnetize anything.
     
  16. LordMorpheus

    LordMorpheus Diamond Member

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    I've seen devices in highschool science labs for this.

    basically it's just a little box you can put something in, and hidden in the device there is a coil of wire around the box making the magnetic field.

    The idea is to heat something up to loosen the domains, and drop it in the box and wait until it cools.

    Excessive heat/shock/vibrations will cause your new magnet to loose so of its domain alignment.
     
  17. her209

    her209 No Lifer

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    This.
     
  18. BoomerD

    BoomerD Lifer

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    So then, the OBVIOUS answer is to stick in the demagnetizer backwards? :p
     
  19. Jeeebus

    Jeeebus Diamond Member

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