 | | From: | giuseppe pezzella | | Subject: | material that can deviated or block the magnetic field without to be attracted from it | | Date: | Mon, 10 Jan 2005 17:01:33 GMT |
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 | Hi folk
I would want ask you if exists a material that can deviated
or block the magnetic field without to be attracted from it
Thank You
Giuseppe Pezzella
Energy Lab
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| | From: | ceraboy at yahoo.com | | Subject: | Re: material that can deviated or block the magnetic field without to be attracted from it | | Date: | 10 Jan 2005 20:43:00 -0800 |
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| Other than elemental type I superconductors I dont have any other
practical options. In the end your first suggestion is probably still
the best, a type II SC and just make sure it is zero field cooled.
Depending upon the strength of the opposing magnetic field BSCCO would
work as well as Nb3Sn. If the field strength is too high the SC will
trap magentic flux and then your shield is no good.
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| | From: | Uncle Al | | Subject: | Re: material that can deviated or block the magnetic field without to be | | Date: | Mon, 10 Jan 2005 18:01:16 -0800 |
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| ceraboy@yahoo.com wrote:
>
> YBCO is a type II superonductor which both repulses and traps magnetic
> flux. You can indeed set it up to repel magnetic flux, but dont forget
> this only applies at 90K or -200C and it while it is very easy to
> produce polycrystalline chunks it is a bit more challengening to grow
> single domains which will really give you the impressive properties. .
OK, name another magnetic shield that is not ferromagnetic. Elemental
niobium is a Type I supercon. It's difficult to cool.
--
Uncle Al
http://www.mazepath.com/uncleal/
(Toxic URL! Unsafe for children and most mammals)
http://www.mazepath.com/uncleal/qz.pdf
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| | From: | Gregory L. Hansen | | Subject: | Re: material that can deviated or block the magnetic field without to be attracted from it | | Date: | Tue, 11 Jan 2005 02:25:51 +0000 (UTC) |
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| In article ,
giuseppe pezzella wrote:
>Hi folk
>I would want ask you if exists a material that can deviated
>or block the magnetic field without to be attracted from it
>Thank You
>
>Giuseppe Pezzella
>Energy Lab
To affect the magnetic field is to be affected by it.
--
"A nice adaptation of conditions will make almost any hypothesis agree
with the phenomena. This will please the imagination but does not advance
our knowledge." -- J. Black, 1803.
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| | From: | Uncle Al | | Subject: | Re: material that can deviated or block the magnetic field without to be | | Date: | Mon, 10 Jan 2005 10:41:40 -0800 |
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| giuseppe pezzella wrote:
>
> Hi folk
> I would want ask you if exists a material that can deviated
> or block the magnetic field without to be attracted from it
> Thank You
Superconductor - 100% repulsion via the Meissner effect. YBCO is easy
enough to fabricate and cool.
--
Uncle Al
http://www.mazepath.com/uncleal/
(Toxic URL! Unsafe for children and most mammals)
http://www.mazepath.com/uncleal/qz.pdf
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| | From: | giuseppe pezzella | | Subject: | Re: material that can deviated or block the magnetic field without to be attracted from it | | Date: | Wed, 12 Jan 2005 09:58:44 GMT |
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| Hi and thank you for your help
but i need a material that work at 300K
So which is the best with this restriction?
"Uncle Al" ha scritto nel messaggio
news:41E2CC64.41C55841@hate.spam.net...
> giuseppe pezzella wrote:
>>
>> Hi folk
>> I would want ask you if exists a material that can deviated
>> or block the magnetic field without to be attracted from it
>> Thank You
>
> Superconductor - 100% repulsion via the Meissner effect. YBCO is easy
> enough to fabricate and cool.
>
> --
> Uncle Al
> http://www.mazepath.com/uncleal/
> (Toxic URL! Unsafe for children and most mammals)
> http://www.mazepath.com/uncleal/qz.pdf
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| | From: | Uncle Al | | Subject: | Re: material that can deviated or block the magnetic field without to | | Date: | Wed, 12 Jan 2005 08:07:45 -0800 |
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| giuseppe pezzella wrote:
>
> Hi and thank you for your help
> but i need a material that work at 300K
> So which is the best with this restriction?
Nothing, by the book. You have a choice of something like Mu Metal or
Co-Netic, or compensating field coils.
--
Uncle Al
http://www.mazepath.com/uncleal/
(Toxic URL! Unsafe for children and most mammals)
http://www.mazepath.com/uncleal/qz.pdf
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| | From: | Gregory L. Hansen | | Subject: | Re: material that can deviated or block the magnetic field without to be attracted from it | | Date: | Wed, 12 Jan 2005 16:56:32 +0000 (UTC) |
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| In article ,
giuseppe pezzella wrote:
>Hi and thank you for your help
>but i need a material that work at 300K
>So which is the best with this restriction?
>
>"Uncle Al" ha scritto nel messaggio
>news:41E2CC64.41C55841@hate.spam.net...
>> giuseppe pezzella wrote:
>>>
>>> Hi folk
>>> I would want ask you if exists a material that can deviated
>>> or block the magnetic field without to be attracted from it
>>> Thank You
>>
>> Superconductor - 100% repulsion via the Meissner effect. YBCO is easy
>> enough to fabricate and cool.
Ferrous materials or Helmholtz coils. Both will experience magnetic
forces, although small forces unless you have a 5 tesla magnet involved.
If that's going to be a problem, some rethinking of the design will be
needed. What's the application?
--
"Let us learn to dream, gentlemen, then perhaps we shall find the
truth... But let us beware of publishing our dreams before they have been
put to the proof by the waking understanding." -- Friedrich August Kekulé
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| | From: | ceraboy at yahoo.com | | Subject: | Re: material that can deviated or block the magnetic field without to be attracted from it | | Date: | 10 Jan 2005 17:05:33 -0800 |
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| YBCO is a type II superonductor which both repulses and traps magnetic
flux. You can indeed set it up to repel magnetic flux, but dont forget
this only applies at 90K or -200C and it while it is very easy to
produce polycrystalline chunks it is a bit more challengening to grow
single domains which will really give you the impressive properties. .
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