Dissociation Energy of TiO and TiO2 Gaseous Molecules

Abstract

Using the Kundsen effusion‐mass spectrometric technique, the reactions: ${\mathrm{TiO}}_2(\mathrm{g}\mathrm{)=}\mathrm{TiO}(\mathrm{g}\mathrm{)\; +}\mathrm{O}(\mathrm{g})$ and ${\mathrm{TiO}}_2(\mathrm{g}\mathrm{)\; +}\mathrm{Ti}(\mathrm{g}\text{)=2}\mathrm{TiO}(\mathrm{g})$ were studied in the temperature ranges 2000°–2250°K and 2150°–2500°K. The dissociation energy of TiO(g) and TiO₂(g) were derived from all gas reactions involving only titanium‐oxygen species: $D_0^{°}(\mathrm{TiO}\text{)=144 ± 5}$ and $D_0^{°}({\mathrm{TiO}}_2\text{)=286 ± 10\hspace{0.17em}}\mathrm{kcal}/\mathrm{mole},$ respectively. A comparison with the results by other authors is also reported.