Celani's abstract did not fit in the ICCF-14
book, so I had to cut it back. If this result can
be replicated, it will be very important, so
attached is the full, original abstract.
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Deuterons electromigration in thin Pd wires
coated with nano-particles: evidence for
ultra-fast Deuterium loading and anomalous, large, thermal effects.
Francesco Celani, A. Spallone, E. Righi, G. Trenta, V. Andreassi,
A. Marmigi, G. Cappuccio, D. Hampai.
INFN-LNF Via E. Fermi 40, 00044 Frascati, Rome,
Italy E-mail: <mailto:[EMAIL PROTECTED]>[EMAIL PROTECTED]
P. Marini, V. Di Stefano, M. Nakamura, F. Todarello, E. Purchi.
ISCMNS, Rome Group#1,Via Lero 30, 00129 Rome, Italy
U. Mastromatteo
STMicroelectronics SpA, Via Tolomeo 1, 20010 Cornaredo, Milan, Italy
A. Mancini
ORIM SpA, Via Concordia 65, 62100 Piediripa, Macerata, Italy
F. Falcioni, M. Marchesini, P. Di Biagio, U. Martini.
CSM SpA, Via di Castel Romano 100, 00129 Rome, Italy
P.G. Sona
Via S. Carlo 12, 20090 Segrate, Milan, Italy
F. Fontana, L. Gamberale, D. Garbelli.
Pirelli Labs SpA, Viale Sarca 222, 20126 Milan, Italy
A new procedure has been developed, at Frascati
National Laboratories of Istituto Nazionale di
Fisica Nucleare, for the production and detection
of anomalous thermal effects on long (50-150 cm)
and thin (50 micron [was "mm" -- a typo]) Pd
wires. The wires surface was previously coated
with a complex mixture of salts and
nanomaterials, capable to produce, after high
temperatures heating in air, a thin layer of
nanometric materials. The wires, put in a
stainless steel chamber pressurised with
Deuterium gas, were Joule heated by a dc current
(J=5000-50000A/cm2); the combined effect of high
electric field and high temperature caused a
large deuterons electromigration in the wires.
By applying a D2 pressure of 5bar have been observed:
a) extremely short loading time (6-12s) to
achieve the R/Ro value of 2 at temperatures (from
23°C) peaked to 45°C, for few seconds, during
Deuterium intake. The steady state D/Pd ratio was about 0.8 at 23°C;
b) anomalous thermal effects when large
elettromigration current was applied.
In our experimental set-up, at the moment, an
isoperibolic calorimeter was used for the
assessment of possible anomalous thermal effects
because fast response time (about 1500s) and
simplicity. Such anomalous effects seem to be
related to a trigger temperature of about 120°C
and tend to increase in magnitude by increasing
wire temperature. Up to now, with a Pd wire of
14mg of weight, an anomalous power of over 3W at
about 300°C was detected: such value is
equivalent to a power density of over 200W/g of Pd.
The anomalous thermal effects are proportional to
the intensity of the current flowing along the
wire and increase with the increasing of the current density.
Regarding the observed ultra-fast loading rate
(6-12s) in our experimental conditions, we tested
for comparison some virgin Pd wires, whose
surfaces were only carefully cleaned (organic
solvent àwater ànitric acidàwater): we observed a
remarkably longer loading time (1000-3000s).
The specific material developed for the wire
coating (patent submitted) is stabilised by high
temperature cycles (600-800°C).
Blank experiments were made with 4He gas instead of D2.
Some experiments with H2 gas are just now in progress.
Further experiments and improvements of the
experimental set-up are in progress in order to:
a) increase the anomalous power density;
b) study the stability over time;
c) reduce the input power needed to keep the
system at temperatures larger than the trigger one;
d) add flow calorimetry to the experimental set-up.
