Solubilities of various metal oxides in molten Li/K carbonates have been measured at 650°C under carbon dioxide atmosphere. It is found that the solubility of NiO and PbO decreases with increasing lithium mole fraction and decreasing CO2 partial pressure. On the other hand, the emf measurement shows opposite effects, i.e., decreasing CO2 pressure leads to more negative emf values but increasing lithium content gives more positive emf values. This contradiction is explained by means of a complex formation model. The possible species for lead are proposed to be [Pb(CO3)2]-2 and/or [Pb(CO3) 3]-4. A similar complex chemistry for nickel oxide dissolution might be expected.
|Title of host publication||Proceedings of The International George Papatheodorou Symposium|
|Place of Publication||Patras|
|Publication status||Published - 1999|
|Event||The International George Papatheodorou Symposium - Patras, Greece|
Duration: 17 Sep 1999 → 19 Sep 1999
|Conference||The International George Papatheodorou Symposium|
|Period||17/09/1999 → 19/09/1999|