During experiments on CMNS (ICCF14 Conference, 2008), we observed that the apparent self-temperature (by Joule heating) of a long (l=65cm) and thin (F=50mm) Pd wire with the surface slightly nano-coated (under 4He gas), was lower than a similar one of Pt with regular surface. A second Pt wire, close to the Pd or Pt, was used as an independent test of the temperatures. In order to elucidate the phenomenon, we built a dedicated apparatus: to maximize the effect, the reaction chamber was kept under mild vacuum (10-4Atm) and a second wire, of Pt, was kept close to the Pd under test in order to cross-check the results. Experiments were made, without opening the reactor, with 'virgin' Pd wire with surface oxidized � virgin � after H2 absorption and proper degassing of virgin wire. The results showed that the surface modified wires have a temperature as low as 90� C (specially that after H2 treatments), in the temperature range of 400-600� C, in respect to the virgin one. A more sophisticated apparatus is under construction and we will test also the nano-coated Pd wires. Such effects can be applied in devices that need large heat dissipation under vacuum conditions (like satellites). The phenomenon was predicted by Max Plank but never observed at macroscopic levels.

Improvement of thermal irradiation by nanocoating of thin wires

239th National Meeting (2010)

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