J. Japan Inst. Metals, Vol. 40, No. 9 (1976),
pp. 958-964

A Thermodynamic Study of the Se-Te System by the Knudsencell-Massfilter Method

Michio Nanjo¹, Sigeatsu Nakazawa¹, Akira Yazawa¹ and Kentaro Taniuchi¹

Abstract:

Mass spectrometric analysis of the vapour phase of Se-Te alloys was performed by means of a mass filter. The heat of vaporization and activities of Se and Te were measured over the whole composition range. The activity data on Se and Te showed a positive deviation from Raoult's law at 714 K. The highest departures were observed in the dilute solutions.
The trimer, Te₃, was detected over Te and Se-Te alloy melts. The vapour phase of Se-Te alloys was very complex to form Se, Se₂, Te, SeTe, Se₂Te, Se₃, SeTe₂, Se₄, Te₃, Se₃Te, Se₅, Se₂Te₂ and Se₄Te within 500 amu.
The inexpensive mass-filter was found to be serviceable for the study of the complex system.

(Received 1976/03/8)

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