Two kinds of galvanic cells with yttria-stabilized zirconia as solid electrolyte, used as O sensors for long-term measurements in metallurgical plants, were studied. Graphite is the main component of the ref. electrode of the O chem. potential. The emfs of the galvanic cells were measured against p(O2) from 2.28 to 10.64 kPa at different temps. Thermodn. anal. indicates that the chem. equil. detg. the O chem. potential at the interface are, resp. C(graphite) + O2(g) = CO2(g) and 0.947Fe(cr) + 1/2O2(g) = Fe0.947O(cr).
THERMODYNAMIC-EQUILIBRIUM AT A GRAPHITE-TO-ZIRCONIA ELECTROLYTE INTERFACE / Gozzi, Daniele; Carnevale, G; Petrucci, L; Petrucci, M.. - In: JOURNAL OF CHEMICAL THERMODYNAMICS. - ISSN 0021-9614. - STAMPA. - 20:11(1988), pp. 1327-1335. [10.1016/0021-9614(88)90170-X]
THERMODYNAMIC-EQUILIBRIUM AT A GRAPHITE-TO-ZIRCONIA ELECTROLYTE INTERFACE
GOZZI, Daniele;
1988
Abstract
Two kinds of galvanic cells with yttria-stabilized zirconia as solid electrolyte, used as O sensors for long-term measurements in metallurgical plants, were studied. Graphite is the main component of the ref. electrode of the O chem. potential. The emfs of the galvanic cells were measured against p(O2) from 2.28 to 10.64 kPa at different temps. Thermodn. anal. indicates that the chem. equil. detg. the O chem. potential at the interface are, resp. C(graphite) + O2(g) = CO2(g) and 0.947Fe(cr) + 1/2O2(g) = Fe0.947O(cr).I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
