G'morning Reid, > ... Tests indicate the purifiers remove 99% of all partcles down to > 1.0 micron, and I'd think this would happen near the surface.
Which raises the question of whether it is at the surface that you want the most antimicrobial activity? > I also want to explore the possibility of firing upto about 600C, at > which temperature the carbon should burn off. But I don't know what > this may do to the silver bond. And because of the higher > temperatures at which the pottery is fired, upto 1050C, the silver in > whatever form can only be applied after firing. The melting point of silver is 961, boiling point 2212... Vapor pressure of molten silver at 1050 C, if I calculate it right, is about 15 millitorr or 2x10e-5 atm. Given a fine-pored matrix would the silver, at most, be somewhat depleted at the surface, but still present in the bulk of the ceramic? Would it be worth a try to mix the dry clay with CS or a silver nitrate solution instead of water, and testing the resulting material for germicidal activity? As for firing to 600C to burn off the carbon, what are you concerned about? The form the silver might take? Your hope is to be left with silver metal, right? Does silver form oxides at those temperatures? Interesting work, Reid. Be well, Mike D. [Mike Devour, Citizen, Patriot, Libertarian] [[email protected] ] [Speaking only for myself... ] -- The silver-list is a moderated forum for discussion of colloidal silver. Instructions for unsubscribing may be found at: http://silverlist.org To post, address your message to: [email protected] Silver-list archive: http://escribe.com/health/thesilverlist/index.html List maintainer: Mike Devour <[email protected]>
