TY - JOUR
T1 - The solubility and activity determination of NiO in the SiO2-NiO-FeO system
AU - Ramírez, Alejandro Cruz
AU - Serrano, Antonio Romero
AU - Salinas, Elías Rangel
AU - López, Adán Ramírez
AU - Ramírez, Marissa Vargas
PY - 2008/7/15
Y1 - 2008/7/15
N2 - A structural model for the liquid phase of silicate systems was used to obtain the SiO2-NiO-FeO phase diagram and the NiO activities at 1573 and 1673 K. The NiO activities were determined experimentally by equilibrating a pure nickel crucible with an iron-silicate slag and CO-CO2 gas mixture to produce pO2 = 10-6 and 10-10 atm. The NiO activities obtained by the structural model are in good agreement with those obtained experimentally for strongly reduction conditions (10-10 atm), due to the structural model consider only the iron in the divalent state. The Fe3+/Fe2+ ratio and the nickel oxide solubility were increased when the oxygen partial pressure and the temperature were increased.
AB - A structural model for the liquid phase of silicate systems was used to obtain the SiO2-NiO-FeO phase diagram and the NiO activities at 1573 and 1673 K. The NiO activities were determined experimentally by equilibrating a pure nickel crucible with an iron-silicate slag and CO-CO2 gas mixture to produce pO2 = 10-6 and 10-10 atm. The NiO activities obtained by the structural model are in good agreement with those obtained experimentally for strongly reduction conditions (10-10 atm), due to the structural model consider only the iron in the divalent state. The Fe3+/Fe2+ ratio and the nickel oxide solubility were increased when the oxygen partial pressure and the temperature were increased.
KW - Glasses
KW - Phases and equilibria
KW - Slags
KW - Thermodynamics
UR - http://www.scopus.com/inward/record.url?scp=46549085012&partnerID=8YFLogxK
U2 - 10.1016/j.jnoncrysol.2008.03.027
DO - 10.1016/j.jnoncrysol.2008.03.027
M3 - Artículo
SN - 0022-3093
VL - 354
SP - 3533
EP - 3539
JO - Journal of Non-Crystalline Solids
JF - Journal of Non-Crystalline Solids
IS - 30
ER -