Viscosity of the Ionic Liquids Model

The model for TCS Metal Oxide Solutions Database (TCOX) viscosity of slag:

viscosity of slag

where viscosity is viscosity, viscosity of activation energy and activation energy is activation energy.

The excess parameters are expanded via R-K. An example of viscosity of A-B liquid oxide:

example of viscosity of A-B liquid oxide

The parameter of VISC stands for R⋅T⋅ln(viscosity). In Thermo‑Calc software, VISC is implemented as VISC(ionic). In order to quickly acquire the actual viscosity, the parameter of DVIS(ionic) should be used. By coupling to the database, it makes use of the site fractions of each species, which reflects the structural change in the oxide melt.

Units for the viscosity of oxide slag:

  • Pa·s (pascal-second) is the SI unit, mostly used for oxide slag
  • CGS unit is poise (P), 1 poise=0.1 Pa·s
  • Centipoise is also common (cP) because it is equivalent to mPa·s.