Zur Kenntnis der Bildungsenergie des Aluminiumoxyds aus den Elementen

Abstract

A trPs haute temphhure, la r6action:

Galvanic Cells for the Determination of the Standard Molar Free Energy of Formation of Metal Halides, Oxides, and Sulfides at Elevated Temperatures

“…Treadwell and his associates (14,26,30) have shown the usefulness of emf measurements in the case of magnesium oxide, aluminum oxide, and aluminum chloride. Adaption of emf measurements to thermodynamic investigations on titanium and zirconium compounds may be possible.…”

“…To this end, an intermediate solid electrolyte analogous to that in cell (III) may be used. In order to obtain the standard free energy of formation of AlsO,, Treadwell and Terebesi (30)…”

“…For the two binary systems A(X)--C(X) and B(X)--C(X) the Gibbs-Duhem equations read NB,x, dF3,x, + Nc(x> dFc{x> = 0 [31] Substituting Eqs. [30] and [31] in Eq. [29] and recalling that the expression in brackets in Eq.…”

Die Schmelzenthalpie des Benzils und 4-Nitrophenols

“…~fir diese Substanz besteht l~bereinstimmung zwischen den Werten yon Furukawa u. Ginnings [6] und Ditmars u. Douglas [5] an Einkristallen yon ~-AI~03. Die Abweiehung gegenfiber Kelley [7] betr~gt + 0,4--0,9O/o und gegentiber amorphem Aluminiumoxid --2 bis --3O/o [10]. …”

Hydrocarbons from Carbides.

“…The principal difficulties in the preparation of aluminum carbide, AI4C3, are due to its volatility (61,64,75). At the boiling point, 2270°C., the vapor consists of approximately equal volumes of aluminum and aluminum carbide (48).…”