Roger wrote:


> Frank: You have to describe the system and temperature before you can define 
> the stability of Ag2O . Is your system Ag2O in air (where the partial 
> pressure of CO2 is 3.55 * 10-^4 atm, or is the Ag2O in 1 atmosphere of CO2, 
> or somewhere in between? It makes quite a difference. In the clay firing 
> scenario, there is a question as to the correct CO2 partial pressure since an 
> excess of fuel may be used plus the ever present CO2 combustion product 
> itself. Suffice it to say that it is difficult, and probably impossible, to 
> predict with any degree of certainty, what form of silver will be present. 
> Under such circumstances operational repeatability must be demonstrated first 
> before an empirical assessment (probably the only practical option) can be 
> used. In any case, I would be surprised if silver oxide, and not silver metal 
> were found in any quantity. Roger 

1 Atmosphere as far as I know.

After firing, who knows? 

After firing, a section and STEM inspection may be called for. Xray diffraction 
of the section should reveal what form of silver remains.

frank key


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