Über die innere Reibung einiger einfacher, geschmolzener Salze

A Brief Guide to the Structure of High-Temperature Molten Salts and Key Aspects Making Them Different from Their Low-Temperature Relatives, the Ionic Liquids

“… 108 − 110 Instead, high-temperature molten salts have low viscosities often on the order of 1 cP or sometimes less. 111 , 112 What this means is that from a computational perspective, guaranteed convergence of properties requires careful consideration in the case of ILs (simply put, simulations may require tens or hundreds of nanoseconds to converge depending on the property and temperature). 113 , 114 The issue of the high viscosity of ILs is compounded by the fact that force fields, particularly nonpolarizable force fields or those in which charges have not been scaled to account for some level of polarization or charge transfer, have actual model viscosities that are sometimes orders of magnitude larger than the experimental ones.…”

“…Besides the obviously different temperature regimes on which measurements on IL and molten salt systems are carried out, from a computational perspective, a few other notable issues should be highlighted. In general, the lowest room-temperature IL viscosities are on the order of 10–20 times that of liquid water at atmospheric conditions, whereas other ILs have much higher viscosities that can be hundreds of cP or more. − Instead, high-temperature molten salts have low viscosities often on the order of 1 cP or sometimes less. , What this means is that from a computational perspective, guaranteed convergence of properties requires careful consideration in the case of ILs (simply put, simulations may require tens or hundreds of nanoseconds to converge depending on the property and temperature). , The issue of the high viscosity of ILs is compounded by the fact that force fields, particularly nonpolarizable force fields or those in which charges have not been scaled to account for some level of polarization or charge transfer, have actual model viscosities that are sometimes orders of magnitude larger than the experimental ones. , In other words, whereas an IL may be viscous but not in the glass regime, its fixed-charge force field model version may well be.…”

Viscosity of Alkali Fluoride Ionic Melts at Temperatures up to 373.15 K above Melting Points

“…In order to identify some other specific correlations, the validity of the following three "classical" relationships for the viscous flow (Murgulescu and Zuca, 1961, 1963Poignet and Fouletier, 2008) was tested: (6) which are defined as: Arrhenius (eq. 4), Batchinski (eq.…”

Thermophysical and Transport Properties of the BaCl2-CsCl High Temperature Ionic Liquid Mixtures

“…x(BaCl 2 ) = 0; ln η = 8.5621 × 10 -5 + 22464.11(1/T) (9) x(BaCl 2 ) = 0.85; ln η = 9.4437 × 10 -5 + 36604.056(1/T) (10) x(BaCl 2 ) = 0.72; ln η = 6.8408 × 10 -5 + 38080.2909(1/T) (11) x(BaCl 2 ) = 0.53; ln η = 7.5841 × 10 -5 + 33301.0571(1/T) (12) x(BaCl 2 ) = 0.33; ln η = 6.3743 × 10 -5 + 31629.8608(1/T) (13) x(BaCl 2 ) = 0.12; ln η = 8.0944 × 10 -5 + 25160.8858(1/T) (14) x(BaCl 2 ) = 1; ln η = 1.0675 × 10 -4 + 36800.8913(1/T) (15) For better understanding of the viscous flow in these HTILs, the thermodynamic function of activation were calculated from the dynamic viscosity values by considering Eyring's transition state theory. 26,27 The following equation express the absolute approach of Eyring on the dynamic viscosity of a liquid mixture: 26,27…”

“…11 Details on this technique were presented elsewhere. 10,[13][14][15] For both experimental measurement, density and viscosity, were used vertical furnaces working in argon controlled atmosphere. A constant temperature of the furnace within ± 0.2 °C was ensured during measurements.…”