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 <robbiehobbiesh...@gmail.com>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
