There is just about every type of material with just the right properties you are looking for available as a 3d printing medium.
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Mike Fenner
Sent: Tuesday, August 09, 2016 12:44 AM
To: [log in to unmask]
Subject: Re: [TN] looking for medium resistance material
Very kind of you Inge, but this is not really my cup of tea these days. I am aware that there are a number of suppliers of carbon based inks and these can be tailored to produce desired sheet resistivity ranges. That sort of thing is widely used on flex circuits and additive (printed electronics) circuitry. I would think internet searching should bring up a good candidate list of suppliers in a few iterations . There is cross over here to ESD protection products, so that would be a good search area also.
---
Regards
Mike
www.chrisfennerfund.org
www.facebook.com/chrisfennerfund/
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Inge Hernefjord
Sent: Sunday, August 7, 2016 10:37 AM
To: [log in to unmask]
Subject: Re: [TN] looking for medium resistance material
Carl,
when I was active I used to contact SemiAlloys. I needed certain resistivity in lids for resistivity pulsed current seam welding of small packages for missiles. We produced about 50,000 pcs from SemiAlloys with
He/Kr10 exp -10 with succcess. Mike Fenner has more to say , I think..
They are extremly nice to cooperate with. Mike as well, despite he is english.
Semi Alloys Inc
888 S Columbus Ave
Mount Vernon, NY 10550
(914) 664-8318)
Good Luck / Inge
On 7 August 2016 at 05:40, Carl Van Wormer <[log in to unmask]>
wrote:
> I usually want my physical structural resistances to be as low as
> possible
> (conductors) or as high as possible (insulators). Now I need an
> intermediate resistance, probably in the range of 100 to 1000 Ohms per
> square. The application will be an electrostatic shield in an
> alternating field, hopefully balancing magnetic heating losses against
> capacitive shielding effectiveness.
> I have never seen these materials offered from any of my normal
> sources, but I’m sure that there is something out there that will
> work. It could be sheet materials, paints, or slightly conductive
> epoxies, or something else I haven’t thought of. Since there is a
> very wide experience base on this site, I’m asking here first.
> Any suggestions will be appreciated.
>
> Thanks,
> Carl
>
>
>
>
> Carl B. Van Wormer, P.E., AE7GD
> Senior Hardware Engineer
> Cipher Engineering LLC
> 21195 NW Evergreen Pkwy Ste 209
> Hillsboro, OR 97124-7167
> 503-617-7447x303
> [log in to unmask]<mailto:[log in to unmask]>
> http://cipherengineering.com<http://cipherengineering.com/>
>
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>
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