Directed vapor deposition was what I was thinking of (
http://directedvapor.com/technology/). It can do thick coatings, non
line-of-sight, doesn't require hard vacuum, and has relatively high
deposition rates (µm/min). If I were trying to do a hydrogen peroxide cat
pack, I might try screwing around with something like this on a 3d printed
foam-like tortuous path structure.
~Jon
On Sat, Sep 17, 2016 at 9:26 PM, Jonathan Goff <jongoff@xxxxxxxxx> wrote:
I wonder if you could 3D print (in Stainless or some other suitable
material) some sort of intentional tortuous path as the substrate. Make it
intentionally a little porous (don't HIP it or anything fancy), and then
plate the catalyst on the surfaces. You might have to electroplate it on
since you couldn't get good viewing angles for electroplating.
Alternatively, there was a weird vacuum coating process that I read about
once that was supposedly good at coating around corners and such, but I
can't seem to recall the company of the exact process name. I'll dig a
little in my emails to see if I can figure it out.
~Jon
On Sat, Sep 17, 2016 at 8:56 PM, Henry Spencer <hspencer@xxxxxxxxxxxxx>
wrote:
On Sat, 17 Sep 2016, Robert Steinke wrote:
I think Paul's idea has a lot of potential. One issue with it is
pre-compressing the screens. With axial flow you can press them down
with a
hydraulic press. How can you pre-compress the screens radially from
inside
to outside?
If you're winding around a perforated center tube (which becomes the
injector), you can wind under tension. Probably not as good as a press,
but better than nothing.
Henry
