[Terrapreta] Electrical conductivity of charcoal + 08 wishes

[geoff moxham]

Thanks William,
I have met the term carbon foam, somewhere(?), but didn`t realise the
production method. Probably too tired to follow the link. I will
search a bit for it.
I was thinking last week of charring some hessian but couldn`t see any
point except C sequestration. I will definitely try a charring of
various natural webbings and cloth now. Did you do any? Can I use a
paste of it for heatsink compound for my Peltier modules?

As a science ~ Industrial Arts ~ hands ~ on type, I am continuously
amazed by this charcoal journey. Very much of what Sean has written is
also happening to me. I carry charcoal samples... the really pretty
ones... in my pocket when I go to town or the local farmers market. My
kids,  who we are homeschooling, are become walking charcoal
detectors. Unfortunately (maybe not) MrCharcoal.com is taken!!
Cheers
 geoff
CHARmingCHAR.com?





On 17/01/2008, William Carr <Jkirk3279 at qtm.net> wrote:
>
> On Jan 11, 2008, at 10:16 PM, geoff moxham wrote:
>
> > Perhaps the electrical conductivity is related to the formation of
> > graphite sheets/tubes/buckyballs?
>
> Are you familiar with the term "carbon foam" ?
>
>
> I was looking into the idea of a heat sink a few years ago and ran
> across the term.   A carbon mat, basically a woven mat of cotton or
> whatever, is heated in a completely airless environment to very high
> temperatures.
>
> The result is a "carbon foam".      Carbon is pretty much the only
> material still left in the mat, and it now shows some interesting
> properties.
>
> For one, it's extremely heat conductive.    And since heat conduction
> is a similar process to electrical conductivity...  the electrical
> resistance should also decrease.
>
> William Carr
>
>