Equilibrium diagram of Selenium—Tellurium system

An X-ray study of the Se−Te system

“…Table II shows On the other hand, some characteristic lines of pure Se ate still present in the compositions of this phase, proving the continuous effect of Te till the composition of TeSe 5, 16.67 at~£ Te. This m a y be related to the detectable v a r i a t i o n in the unir cell dimension " c " found in the the composition o f T e S e 5 [1]. However, the composition structure of TeSe 5 is closer to the first phase (A-phase), and t h a t of TeSe is nearer to the B-phase.…”

“…Series of Se--Te alloys ranging in chemical composition from pure Se to pure Te have been prepared [1]. The molten mass is quenched and the strucrural nature of the produced ingots is examined by X-ray diffraction technique.…”

“…The molten mass is quenched and the strucrural nature of the produced ingots is examined by X-ray diffraction technique. Differential thermal analysis (DTA) was carried out for the different compositions [1,2]. X-ray diffraction and DTA thermograms of the quenched massive alloys have indicated that samples of >50 at% Te are completely crystalline.…”

Crystallization in Glass Forming Substances: The Chemical Bond Approach

“…Additionally, the Se-Te phase diagram is a simple "fish", which corresponds with the discontinuous series of liquid and solid solutions. However, the metastable phase diagram (remember that glass is formed far below the melting point from a metastable liquid) has a "two-fish" form, with "two series of solid solutions meeting at 96.8 at%Se [i.e., 3.2 at%Te -ECh] and temperature 180 O C" [55].…”

“…Note that the Se-Te glasses display extrema in the 1-4%Te range for the other compositionproperty dependences, e.g., for electrical and crystallization properties [56] and for the glass transition temperature [57]. Dembovsky et al [58] have also revealed non-linearity when investigating crystallization kinetics in Se-Te glasses in the 0-5% range.…”