Differential Scanning Calorimetry Study of Complex Fluorides of Titanium, Niobium and Tantalum

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概要

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• The enthalpy and temperature of the sublimation of nitrosyl fluoride or nitryl fluoride-titanium, niobium and tantalum fluoride adducts were determined from DSC measurements. These adducts were prepared by the reactions of titanium dioxide, metallic niobium and tantalum with the 80 mol% HF-20 mol% NO_2 solvent, the 52° or 68° materials. A closed-cell DSC technique was employed to determine the enthalpies and temperatures and to study the dissociation reactions of some of these adducts. It was found that the adducts, NOTiF_5, NO_2NbF_6 and (NO)_2TaF_7, are converted into NOTi_2F_9, NONbF_6 and NOTaF_6, and then these complex fluorides sublimate at 319, 328 and 374℃, respectively. The enthalpies of the sublimation detected were 20.2, 27.4 and 17.6 kcal mol^<-1>, respectively.

• 東北大学の論文

著者

• Kigoshi Akiichi

  Research Institute Of Mineral Dressing And Metallurgy

関連論文

• Differential Scanning Calorimetry Study of Complex Fluorides of Zirconium, Tin, Vanadium, Silicon, Antimony, Molybdenum and Tellurium
• Differential Scanning Calorimetry Study of Complex Fluorides of Titanium, Niobium and Tantalum

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