Viscosity of selenium melt

Enthalpy relaxation of selenium observed by fast scanning calorimetry

“…6. The value of parameter T 0 = 222 K is comparable to T 0 from VFT equation describing temperature dependence of viscosity data, which is 226 K [31]. Hodge in his paper [3] presents several examples of relaxation of polymers, where the parameter T 0 is comparable with parameter T 2 from Adam-Gibbs-Fulcher equation.…”

“…4, where the limits of glass transition peaks are marked. The relaxation data within these [31]. The temperature range of enthalpy relaxation peak measured using DSC (experiments and data from [13], rates from 1 to 50 K min À1 ) and using FSC (rates from 200 to 10,000 K s À1 ) is illustrated together with temperature range of crystallization peak observed by DSC for different particle size of studied sample and rates from 1 to 30 K min À1 [32].…”

“…The comparison of the width of the relaxation peaks of DSC and FSC measurements is given in Fig. 4 together with the viscosity dependence on temperature [31]. As can be seen, the relaxation peaks obtained by FSC start at lower temperature and are finished at higher temperature compared to DSC measurements (the relaxation peak occurs in the temperature range of 10-125 C; taken from all experiments) and its temperature range corresponds to viscosity range of 10 3 -10 18 Pa s. The overlapping of temperature ranges for relaxation response studied by DSC and FSC is clearly seen in the inset of Fig.…”

Topological Ordering and Viscosity in the Glass-Forming Ge–Se System: The Search for a Structural or Dynamical Signature of the Intermediate Phase

“…The model was used to fit the measured viscosity data for Se (Cukierman and Uhlmann, 1973;Koštál and Málek, 2010;Gueguen et al, 2011), Ge 0.10 Se 0.90 (Nemilov, 1964;Senapati and Varshneya, 1996;Gueguen et al, 2011), Ge 0.20 Se 0.80 (Nemilov, 1964;Gueguen et al, 2011), and Ge 0.25 Se 0.75 (Nemilov, 1964;Senapati and Varshneya, 1996;Gueguen et al, 2011) where two or more of the data sets are self-consistent, and the measured viscosity data for Ge 0.30 Se 0.70 (Gueguen et al, 2011) where only one data set is available. For a given composition, the logarithm of the high-temperature viscosity was treated as either a fitting parameter or a fixed parameter set at log 10 [η ∞ (Pa s)] = − 2.93 (Zheng et al, 2011).…”

Viscosity of Se–Te glass-forming system

“…Viscous behavior of Se-Te melts was studied by Perron et al [16]. We also published review of almost twenty papers dealing with viscous behavior of pure selenium in broad temperature interval [17]. But according to our best knowledge viscous behavior of Se-Te undercooled melts and glasses has not been part of any published work.…”