In reply to Bob Higgins's message of Mon, 6 Oct 2014 16:13:39 -0600: Hi, Even if 300C were the limit, would that really be a problem? IIRC Jed has mentioned that 300-350C is the usual working temperature of fission reactors, so it appears to be a usable temperature range. Furthermore, Rossi's Hot-cat is already operating at temperatures well above 600C.
>This is frequently done with noble metal catalysts. They are mixed with a >thin oxide "wash coat" and applied either to a metal or a ceramic base. >The Ni is tougher to keep from sintering. You want the nano-Ni exposed, >but the nano-features melt at about 600C and will begin sintering at 300C. > >One of the ways that nano materials are fabricated is by successive >oxidation and reduction. The oxidation causes the material to grow (think >how a rusty nail grows as it oxidizes). Then when reduced you are left >with an elemental metal skeleton having features smaller than you began >with. My process uses this technique to expose nano features after partial >sintering by oxidation/reduction with a final step of reduction. I start >with larger particles, add nano-Fe2O3, and then go through stages of >thermal oxidation and reduction. > >Bob Higgins [snip] Regards, Robin van Spaandonk http://rvanspaa.freehostia.com/project.html
