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Liquid magnet (a new technology)
Liquid magnet (a new technology)
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Old 19th July 2019, 02:44 AM   #1
bentoronto is offline bentoronto  Canada
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Liquid magnet (a new technology)
Default Liquid magnet (a new technology)

Seems there is now a way to make liquid magnets.

This New Liquid is Magnetic, and Mesmerizing - The New York Times

With ferrofluids - used in the magnet gap for cooling and damping voice coils - the fluid conducts magnetism but only as long as it is inside the magnetic gap. But this fluid becomes magnetized and retains its magnetism.

Just wild speculation, but I guess you could make a tweeter with no gap, just immersed in the fluid. Sounds interesting, eh.

B.
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Old 21st July 2019, 09:23 AM   #2
esl 63 is offline esl 63
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I see a small problem with a liquid magnet that is not fixed. If you have an alternating magnet field from the coil I guess that the liquid magnet field will turn back and fourth, and not creating a fixed magnetic force.
Adding a fixed magnet to a liquid magnet would turn the liquid magnet to a short cut...
With a net magnetic field of zero as a result.
However if you could mix those magnet particles in a curable glue then you could create an external magnet field by your desire and wait for the particles to cure... maybe... But thats what you are doing today when you make magnets:
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Old 21st July 2019, 07:17 PM   #3
bentoronto is offline bentoronto  Canada
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Liquid magnet (a new technology)
Good to hear the brain waves stirring, even if the conclusion wasn't favourable to a new invention.

What about the ability to spread a very thin magnetic coating on a planar kind of device? Resembles an electret speaker or mic?

B.
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Old 21st July 2019, 09:19 PM   #4
esl 63 is offline esl 63
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Haha... i really tried hard to find a good use for the magnetic liquid.. IŽll guess you can make a nice compass with it!
Or you can have a fixed coil with an AC current trough it and then get get fluid to flow back and forth. Maybe you can make nice patterns with it on a transparent film and a magnetic field?
Maybe you can pour it on a circuit board and create patterns where the current is goin...
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