Jed, can I make a request? Acknowledging your fluency in Japanese and
relationship with Mizuno ...
In Mizuno's paper, he describes the deposition the preparation of the Ni
and the Pd with a good deal of text, but in the final part of the
preparation (page 8, figure 10) he describes heating the ceramic heater
wrapped in Pd wire to 700-800°C for 10-20 hours to deposit Pd on the Ni
surface. This may be the most important part of the process, yet he only
spent 1 small paragraph describing the deposition.
The melting point of Pd is 1550°C and the boiling point of Pd is 2960°C.
Clearly, at the specified temperature of the ceramic heater, the vapor
pressure of the Pd is very, very low. So, without plasma, it is hard to
understand how any Pd is deposited at all. Mizuno only describes D2 as
being in the chamber - there is no Ar that is normally used in sputtering
(energetic Ar ions are used in sputtering to have a better probability of
knocking off atoms of the metal due to the high mass of Ar). Mizuno
doesn't describe a DC plasma condition that would have been used for
striking a glow near the ceramic heater with Pd wire for deposition.
*Can you ask Mizuno if he can provide an explanation of the mechanism of Pd
deposition used in conjunction with the ceramic heater wound with the Pd
wire? Was it an evaporation process, sputtering, or ion plating
technique? Was a plasma active during the Pd deposition? Was it a
deuterium plasma? Was there a DC voltage applied between the heated Pd
wire and the cathode?*
Also, Mizuno shows SEM photos of the Ni mesh cathode surface before and
after the treatment. The after photo shows micron scale bulbous growth
that I surmise from his deposition method cannot be all Pd. It appears
that the surface morphology of the Ni has been vastly altered, and probably
has only a small film thickness of Pd on top of that. His Ni mesh cathode
has a lot of area, and he only has a small amount of Pd wire on the ceramic
*Can you ask Mizuno what he believes is the thickness of Pd that he has
deposited by his final deposition process? I.E. in Figure 32, how thick is
the Pd film on top of the Ni? *
Regards - Bob Higgins