I am using a chemical reduction of a metal salt solution. The metals end up in
the pores of carbon "mesopores". Average pore sizes are around 9nm. I use a
range of mixtures.
The Ni variations are good for higher temps and are cheaper. The Pd variations
cost a lot to make but seem to give a better power density.
If people try such a thing, one "trick" is to do the reduction slowly and at
lower temps (say 10C).
I expect what you really want to know is that I typically about 20:5:75
Ag:Au:Pd, or 20:2:78 Cu:Pt:Ni. Those are the metal ratios for the solution I
use but I am unsure as to what actually gets reduced into the C pores. I am
also see some glimmers of hope for a Ti based material. But work has to wait
till after NI Week. The same with the metal loaded carbon "aerogels" (via
formaldehyde resorcinol sol-gel production.
I use the same type of material in the direct electrical stimulated/heated
"solid state" things. Think souped up carbon resistors. That is why I am
using C instead of the silicate based materials.
Basically (over simplified), I just make the material, put it in a sealed brass
sphere (some with a light insulation inside) and put in a constant temp bath.
The samples get warmer than the bath (while the control sphere remains at the
bath temp. I should say that I put some magnetic materials and some hydrogen
storage metal material in the sphere as well. (load and purge with H or D gas
at dry ice temps, then seal and warm. I expect it is about 5bar inside.)
I get the best results when the spheres are not fully submerged into the bath-
As Case showed (ref. the He measurement things with SRI) there needs to be come
temp gradient or gas flow.
D2
From: [email protected]
To: [email protected]
Subject: RE: [Vo]:Defkalion/MFMP implications for electrolysis?
Date: Fri, 26 Jul 2013 11:48:27 -0700
From:
DJ Cravens
notice you only
need the >179 figure to get above the Debye temp. You can get around
that by alloying the Ni with Cu and even annealing.
Dennis,
Are you using something
akin to Celani’s constantan alloy? Or else Monel?
Jones
