[time-nuts] Hydrogen Maser KIT! Update #1
cfharris at erols.com
Mon Nov 3 20:07:22 EST 2014
I figured that you had a good reason, but from casual viewing
of the pictures you provided the coating looked pretty reasonable,
so I wondered.
The stabilizing agents are the key. Teflon particles don't like
water sticking to them all that well, hence their use in things
like gortex. The stabilizing agents are probably just a surfactant.
I think I might try an experiment with some of the teflon spray
lube relative to outgassing... If I can find a few spare hours.
I would suggest, that unless you are well experienced in handling
such coatings, you try it out on something easier to evaluate,
like perhaps a flask.
cdelect at juno.com wrote:
> The coating opposite the entrance to the bulb was degraded to the point
> that it was missing over a large area and the tiny particles of loose
> Teflon were free to move about in the bulb. (Rolling the bulb you could
> see a little pile of particles moving about) Since a majority of the
> hydrogen atoms entering the bulb impact first at the opposite end that
> would cause a large majority of the atoms in the correct state to be
> perturbed as well as recombine into molecules. So since the end needed
> recoating it's best to do the whole thing.
> Per the question of aqueous dispersions here is an excerpt from Dupont:
> DuPont Teflon® aqueous dispersions are milky white dispersions of PTFE
> particles in water, stabilized by wetting agents.
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