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Revolutionary Battery developed at Stanford University

Started by hansvonlieven, December 20, 2007, 02:10:24 PM

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Koen1

Quote from: Localjoe on February 19, 2008, 01:04:15 PM
Ive got a bit of bismuth left here too and i want to say it  has reflective properties from my experiences with it.. what i wouldn't give for someone to mold me a barrel for my coil gun out of bismuth.

Erm, didn't Bismuth show those magnetic field reflection characteristics
only when cooled with liquid nitrogen, and only because at that temp
it becomes superconducting?
Any superconductor will reflect the magnetic field, as far as I know...

Bismuth may be commercially available (more so in the Americas than in the EU it seems),
but you would probably still have to build a liquid nitrogen cooling system around your
Bismuth barrel...
Which is doable of course, but just something you may want to keep in mind?
;)

helmut

@Koen1
I read somewhere,that the privat fishermen take instead of lead Ballast alternative Bismuth as Ballast.
So it could be commercial  available in such a shop .

helmut

rensseak

Quote from: helmut on March 13, 2008, 05:12:13 PM
@Koen1
I read somewhere,that the privat fishermen take instead of lead Ballast alternative Bismuth as Ballast.
So it could be commercial  available in such a shop .

helmut

Hello all

@helmut

schon irre was sich so alles patentieren l??t!

EP000000658305A1

Allerdings ist dieses Bismuth dann nicht so rein.

Gru?
Norbert

Koen1

thanks I guess? Idunno what that EP thing is,
but

@Helmut: yes, bismuth is used as non-toxic lead replacement
for ballast/weights/sinkers, and also in shot (for hunting).
But not in all countries, and not in all such shops.
Although if one were to want to use bismuth, one should
remember it has a very high melting point so it is not easy
to melt it into a usefull shape. An alloy may be easier,
such as "Rose's metal", which is an alloy of 50% bismuth,
25% lead and 25% tin, and melts at 100 degrees C (give or take
a few degrees). That's a much more workable temperature,
but I'm not sure how much of the desired reflection effect
will remain when you dilute the bismuth so much...