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[CN] The Race To Make The World's Strongest Magnet.

post #1 of 64
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http://www.cnn.com/2011/TECH/innovat....html?hpt=Sbin

Quote:
Throw in the fact that rare earth elements are important to all kinds of technologies -- they're the reason smartphones vibrate, why TVs have vivid reds and greens, and how computer hard drives are able to etch data -- and you've got a recipe that scares many technologists and researchers.

What would happen to our technological landscape without these rare earths?

Hadjipanayis, chairman of physics at the University of Delaware, and researchers from two other institutions, the U.S. Department of Energy's Ames Laboratory in Iowa and GE Global Research in upstate New York, are preparing for that day.

They're in a race to make an even stronger magnet than before -- an essential component in green technologies, which use magnets to transfer electrical energy into motion. And they're trying to do it by using as little neodymium as possible, since that element is getting harder to come by.
I like the recipes they use.

Definitely give Martha Stewart a run for her money.
post #2 of 64
From Wikipedia:

Quote:
The greater force exerted by rare earth magnets creates hazards that are not seen with other types of magnet. Neodymium magnets larger than a few centimeters are strong enough to cause injuries to body parts pinched between two magnets, or a magnet and a metal surface, even causing broken bones.[4] Magnets allowed to get too near each other can strike each other with enough force to chip and shatter the brittle material, and the flying chips can cause injuries. There have even been cases where young children who have swallowed several magnets have had a fold of the digestive tract pinched between the magnets, causing injury or death.[5] The stronger magnetic fields can be hazardous to mechanical and electronic devices, as they can erase magnetic media such as floppy disks and credit cards, and magnetize watches and other clockwork mechanisms and the shadow masks of CRT type monitors at a significant distance.
post #3 of 64
so can a powerful magnet be used as a reliable HDD secure erase tool?
post #4 of 64
will they still stick to my fridge?
post #5 of 64
Quote:
Originally Posted by PureLogic View Post
will they still stick to my fridge?
Quote:
Scientists measure the strength of magnets with a unit called the "maximum energy product." A typical refrigerator magnet has a rating of 3 or 4.

Current neodymium magnets register 57 to 60.
Goodluck getting them back off your fridge
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post #6 of 64
Quote:
Originally Posted by velocd View Post
The stronger magnetic fields can be hazardous to mechanical and electronic devices, as they can erase magnetic media such as floppy disks and credit cards, and magnetize watches and other clockwork mechanisms and the shadow masks of CRT type monitors at a significant distance.
who ever wrote that clearly does know that magnets no matter how strong will NOT erase data from any magnetic media because i tried it with a credit card (with neodymium magnets for several hours) and nothing happened it still worked and the same with hard drives USB flash drives cheap watches (analog and digital) and all of them still worked fine the only thing thats right there is the CRT monitor magnets and CRT is like chalk and cheese and everyone knows that

EDIT: I'm only talking about natural magnets not electromagnets.
    
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post #7 of 64
Quote:
Originally Posted by hollowtek View Post
so can a powerful magnet be used as a reliable HDD secure erase tool?
no
    
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post #8 of 64
I've used 500+ magnets and have messed up a mechanical watch.
It runs 45 minutes slow every 24 hours now .
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post #9 of 64
Quote:
Originally Posted by andrews2547 View Post
no
A strong magnet, such as one hooked up to a car battery, can easily erase tape drives from a few feet away. So in theory, yes. But not practical in most cases.
post #10 of 64
Formula to make the strongest magnet:

1)Make magnet out of most magnetic metal
2)Get an insanely powerful amp
3)hook it up
4)Disrupt Wi-Fi, G signals, and cable
5)Control Radiation
6)Overpower magnetic polls
7)Make earth rotate backwards, up, down, randomly, etc.
8)move radiation over to country full of terrorists and kill them!



I think they can possibly control radiation with this. That would be good. When a nuclear power plant goes boom, we got it under control.
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