Thermodynamic study of the manganese/ manganous-oxide system by the use of solid oxide electrolytes

✍ Scribed by C.B. Alcock; S. Zador

• Publisher: Elsevier Science
• Year: 1967
• Tongue: English
• Weight: 338 KB
• Volume: 12
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/0013-4686(67)85035-7

✦ Synopsis

The free energy of formation of manganous oxide has been determined by measurement of the emfs of the cells and NilNiO 1 ThO,-YO,., electrolyte 1 MnlMnO FelF%.s,O I ThOl-Y01.5 electrolyte I MnlMnO in the temperature interval 923-1273°K. The results agree quite closely with calorimetric data for the reaction Mn + @, + MnO. The study thus demonstrates that the thoria-based oxide electrolytes can be used at temperatures around 1000°C for the study of the thermodynamics of oxide systems having oxygen dissociation pressures of about lO-% atm. R&x&-L'6nergie libre de formation de I'oxyde manganeux a et6 d&erminQ en mesurant les forces &ctromotrices de cellules et NilNiO 1 ThOs-YO,,, electrolyte 1 MnlMnO FelFe,,,, 0 I ThOs-YO,,, &.ctrolyte I MnlMnO dans l'intervalle de temperature 9234273°K. Les r6sultats correspondent tout a fait aux don&s calorim&iques propres a la reaction Mn+)o,+Mno.

Cette etude demontre que des oxydm &ctrolytes a base de thorine peuvent ainsi &re utili& vers 1OOO"C, en vue de l'&ude thermodynamique des syst&mes d'oxydes a pression de dissociation en oxyg&ne #environ 1O-sr atm.