[SI-LIST] Re: relative magnetic permeability of tungsten,mol ybdenum... proving hard to find
- From: Aubrey_Sparkman@xxxxxxxx
- To: si-list@xxxxxxxxxxxxx
- Date: Fri, 7 Nov 2003 08:41:01 -0600
As I remember it, only Iron, Nickel, and Cobalt have a Ur significantly
greater than 1. Look up Alloy 42 for interesting properties of an alloy
that combines all three. You should get a sample of the material as you
plan to use it and measure since this property is STRONGLY affected by
processing as well as contaminants (Phosphorus content in some Nickel
plating).
Aubrey Sparkman
Enterprise Engineering Signal Integrity Team
Dell, Inc.
Aubrey_Sparkman@xxxxxxxx
(512) 723-3592
> -----Original Message-----
> From: Tabatchnick, Justin [mailto:justin.tabatchnick@xxxxxxxxx]
> Sent: Thursday, November 06, 2003 8:40 PM
> To: si-list@xxxxxxxxxxxxx
> Subject: [SI-LIST] Re: relative magnetic permeability of tungsten,
> molybdenum... proving hard to find
>
>
> Tungsten =3D1
> Gold =3D1=20
> Molybdenum =3D1
>
> Basically all non-ferrous metals has a relative permeability =3D1
>
> Justin - Intel
>
> -----Original Message-----
> From: si-list-bounce@xxxxxxxxxxxxx
> [mailto:si-list-bounce@xxxxxxxxxxxxx]
> On Behalf Of WALKER, Mark
> Sent: Thursday, November 06, 2003 9:11 AM
> To: si-list@xxxxxxxxxxxxx
> Subject: [SI-LIST] relative magnetic permeability of tungsten,
> molybdenum... proving hard to find
>
>
> All, can you help me out with the relative magnetic permeability of a
> few
> conductors?
>
> I've spent most of the afternoon using google and searching
> through the
> numerous engineering, physics & chemistry handbooks in our
> library, all
> to
> no avail. I'm looking at materials used for MCM conductors plus a few
> others
> for comparison, with a view to analysing the effects on multi-gigabit
> serial
> link type signals.
>
> Ideally, I'd like to complete the following list for relative magnetic
> permeability, Ur:
>
> copper, Ur =3D 1.
> gold
> molybdenum
> tungsten
> nickel, Ur in the range 5 to 20 (assume 10) at 1 GHz (see Johnson &
> Graham,
> black magic 2, p267).
>
> However, even if such figures are forthcoming, are they close
> enough to
> the
> paste like compounds used for MCM conductors?
>
> Cheers,
> Mark.
>
> Stevenage,
> England.
>
> This email is for the intended addressee only.
> If you have received it in error then you must not use, retain,
> disseminate or otherwise deal with it.
> Please notify the sender by return email.
> The views of the author may not necessarily constitute the
> views of EADS
> Astrium Limited.
> Nothing in this email shall bind EADS Astrium Limited in any
> contract or
> obligation.
>
> EADS Astrium Limited, Registered in England and Wales No. 2449259
> Registered Office: Gunnels Wood Road, Stevenage,
> Hertfordshire, SG1 2AS,
> England
> ------------------------------------------------------------------
> To unsubscribe from si-list:
> si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
>
> or to administer your membership from a web page, go to:
> //www.freelists.org/webpage/si-list
>
> For help:
> si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
>
> List archives are viewable at: =20
> //www.freelists.org/archives/si-list
> or at our remote archives:
> http://groups.yahoo.com/group/si-list/messages=20
> Old (prior to June 6, 2001) list archives are viewable at:
> http://www.qsl.net/wb6tpu
> =20
>
> ------------------------------------------------------------------
> To unsubscribe from si-list:
> si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
>
> or to administer your membership from a web page, go to:
> //www.freelists.org/webpage/si-list
>
> For help:
> si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
>
> List archives are viewable at:
> //www.freelists.org/archives/si-list
> or at our remote archives:
> http://groups.yahoo.com/group/si-list/messages
> Old (prior to June 6, 2001) list archives are viewable at:
> http://www.qsl.net/wb6tpu
>
>
>
------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
or to administer your membership from a web page, go to:
//www.freelists.org/webpage/si-list
For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
List archives are viewable at:
//www.freelists.org/archives/si-list
or at our remote archives:
http://groups.yahoo.com/group/si-list/messages
Old (prior to June 6, 2001) list archives are viewable at:
http://www.qsl.net/wb6tpu
Other related posts:
- » [SI-LIST] Re: relative magnetic permeability of tungsten,mol ybdenum... proving hard to find
