Teslaalse,
I worry that the sintering is a result of oxidizing and
cleaning it that way would destroy the geometry you are trying to retain, I
would think there should be a chemical way to deoxygenate your powder in the
glove and then let it dry in the inert atmosphere. A small ball mill would be
an interesting toy to add to the box as well since any new surfaces exposed or
cleaned mechanically would be prevented from reacting with ambient.
Fran
From: Teslaalset [mailto:[email protected]]
Sent: Thursday, May 30, 2013 9:13 AM
To: [email protected]
Subject: EXTERNAL: Re: [Vo]:Removing nickel oxide layer
A glovebox filled with inert gas would help, I agree, but most of the Ni Powder
is shipped in non cealed jars or even envelopes so they are already oxidized at
arrival.
I also read that CO gas would help removing Ni oxide, perhaps at lower
temperatures. CO gas is tricky stuff though.
Maybe heating Ni oxidized powder in higher pressure Hydrogen will allow removal
at lower temperatures as well.
On Thu, May 30, 2013 at 2:51 PM, Roarty, Francis X
<[email protected]<mailto:[email protected]>> wrote:
Teslaalse,
If you have the glove box I would recommend doing all prep in an inert cover
like helium. It is a pet theory but I am positing that ambient gases limit the
milling or chemical activation of metal powders by reacting with the geometry
formation to dissipate the casimir force... closing the cavity entirely or
growing perpendicular whiskers between to dissipate the force. The Casimir
force is responsible for stiction but changes in this force are responsible for
catalytic action like we see at openings and defects in nanotubes.. These
changes scale at the cube of distance between parallel boundaries becoming the
most powerful force of attraction below the tens of nanometers scale that we
call stiction.. It is logical this force continues to scale even smaller but
there is little talk of Casimir fprce below the nano scale because IMHO it is
already normalized into our science as an additional binding force which helps
molten metals congeal into a solid without pico bubbles and why skeletal cats
have to be formed by multiple steps where lower melting point metals have to be
leached out of higher melting point metals to form activated cavities. It is a
an extra step but along with storing the powder in a hydrogen atmosphere for
several weeks to get the FCC - 14 to 1 lattice structure Jones mentioned
yesterday you could greatly improve your odds of starting out with a good LENR
candidate.
Fran
From: Bob Higgins
[mailto:[email protected]<mailto:[email protected]>]
Sent: Thursday, May 30, 2013 7:40 AM
To: [email protected]<mailto:[email protected]>
Subject: EXTERNAL: Re: [Vo]:Removing nickel oxide layer
Nickel oxide is removed pretty easily in H2 at about 310C. Once it is removed,
you will see the sintering begin at the same temperature. The clean Ni
surfaces begin to bond and the particles begin to grow. That is why, in part
you must add the catalyst powder - to prevent the wholesale sintering of the Ni.
The catalyst nanopowder I have been experimenting with is Fe2O3 nanopowder.
The oxide nanopowders are much less expensive and are less dangerous to handle.
Still, they must be handled in a dry glove box because the humidity will cause
the nanopowder to agglomerate by hydrophyllic bonding. If the nanopowder
agglomerates, you may be unable to get the nanoscale mixing onto your Ni powder.
Bob
On Thu, May 30, 2013 at 5:54 AM, Teslaalset
<[email protected]<mailto:[email protected]>> wrote:
Just buying nickel micro powder, I assume this comes slightly oxidized.
How would that be removed as a first step in preparing nickel powder for LENR
experiments?
Just heat in in a hydrogen environment at temperatures of a few hundred degrees
C?
--
Regards,
Bob Higgins
