Discussion:
Magnet Info
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bob urz
2013-05-06 15:51:59 UTC
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http://www.electronicproducts.com/Passive_Components/Magnetics_Inductors_Transformers/What_Makes_Rare-Earth_Magnets_So_Special_amp_How_are_they_made.aspx

bob
Rupert
2013-05-06 16:08:29 UTC
Permalink
Post by bob urz
http://www.electronicproducts.com/Passive_Components/Magnetics_Inductors_Transformers/What_Makes_Rare-Earth_Magnets_So_Special_amp_How_are_they_made.aspx
bob
Very cool. I didn't know this info before. Makes me wonder why there has been a shortage since they're manufactured from scratch rather than "dug up". Probably an artificial shortage.
Les Cargill
2013-05-06 17:29:48 UTC
Permalink
Post by Rupert
Post by bob urz
http://www.electronicproducts.com/Passive_Components/Magnetics_Inductors_Transformers/What_Makes_Rare-Earth_Magnets_So_Special_amp_How_are_they_made.aspx
bob
Post by Rupert
Very cool. I didn't know this info before. Makes me wonder why there
has been a shortage since they're manufactured from scratch rather
than "dug up".
No, the actual rare earth metals are dug up. the magnets are alloys.
The term "rare earth" is a little misleading, and I think of it
as something like a proper name.
Post by Rupert
Probably an artificial shortage.
1) Tim Worstall may actually know. He's in that business and
has a blog.

http://www.forbes.com/sites/timworstall/2012/10/27/something-strange-in-chinese-rare-earths-production/

2) This : http://www.pbs.org/wgbh/nova/physics/hunting-elements.html
kinda goes into that subject briefly. Rare earth metals aren't all that
rare, they're just poorly distributed. Production is a lot
about the energy costs to extract them.
--
Les Cargill
Flint
2013-05-08 12:35:20 UTC
Permalink
Post by Les Cargill
Post by Rupert
Post by bob urz
http://www.electronicproducts.com/Passive_Components/Magnetics_Inductors_Transformers/What_Makes_Rare-Earth_Magnets_So_Special_amp_How_are_they_made.aspx
bob
Post by Rupert
Very cool. I didn't know this info before. Makes me wonder why there
has been a shortage since they're manufactured from scratch rather
than "dug up".
No, the actual rare earth metals are dug up. the magnets are alloys.
The term "rare earth" is a little misleading, and I think of it
as something like a proper name.
Post by Rupert
Probably an artificial shortage.
1) Tim Worstall may actually know. He's in that business and
has a blog.
http://www.forbes.com/sites/timworstall/2012/10/27/something-strange-in-chinese-rare-earths-production/
2) This : http://www.pbs.org/wgbh/nova/physics/hunting-elements.html
kinda goes into that subject briefly. Rare earth metals aren't all that
rare, they're just poorly distributed. Production is a lot
about the energy costs to extract them.
My understanding is that China has the lion's share of actual rare
earth materials in the world. Is this correct?
--
MFB
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