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@ARTICLE{Schupsky:885651,
      author       = {Schupsky, Jan Peter and Saar, Olga and Wu, Guixuan and
                      Dohrn, Matthias and Müller, Michael},
      title        = {{V}iscosity and crystal morphology data of anorthite
                      bearing synthetic coal slag systems},
      journal      = {Fuel},
      volume       = {280},
      issn         = {0016-2361},
      address      = {New York, NY [u.a.]},
      publisher    = {Elsevier},
      reportid     = {FZJ-2020-03982},
      pages        = {118663 -},
      year         = {2020},
      abstract     = {In this study, three synthetic SiO2-Al2O3-CaO-Fe2O3(-MgO)
                      coal slag systems (ST-D-2, HKT, SOM-1) with varying basicity
                      were investigated on their viscosity and the dominant
                      crystallisation product: anorthite (CaAl2Si2O8). To predict
                      crystallisation products, thermodynamic equilibrium
                      calculations were executed using FactSage and the GTox
                      database. Anorthite is predicted as a major crystallising
                      phase in the slags. High temperature viscosimetry revealed
                      non-Newtonian behaviour of the slags below 1275 °C.
                      Additional viscosity measurements revealed viscosity
                      deviations, based on crystallisation. Post-experimental
                      analysis of the slags revealed the presence of elongated
                      crystals with anorthite composition. Additional quenching
                      experiments were performed and crystallisation results of
                      the HKT slag were exemplarily shown in this study. Quenched
                      samples were analysed by XRD and SEM-EDX to determine the
                      crystallised phases and the crystal structure. Anorthite was
                      identified as the dominant phase in the HKT slag but also in
                      the ST-D-2 and SOM-1 slag system. As crystallisation
                      strongly influences slag viscosity, a phase analysis of
                      anorthite was conducted. The crystal morphology of anorthite
                      displayed a common elongated characteristic and was
                      generalised as a tetragonal prism with variations in its
                      dimensions. Crystal size measurements ascertained constant
                      small crystal sizes at temperatures below 1100 °C, and
                      exhibited an increase of anorthite length with increasing
                      temperatures above 1100 °C. Additionally, the aspect ratio
                      was examined to ensure a complete three-dimensional
                      characterisation of the anorthite phase. Crystal morphology
                      data can be used in a future viscosity model as enhancing
                      parameters to enable the calculation of viscosities for
                      partly crystallised slags.},
      cin          = {IEK-2},
      ddc          = {660},
      cid          = {I:(DE-Juel1)IEK-2-20101013},
      pnm          = {113 - Methods and Concepts for Material Development
                      (POF3-113)},
      pid          = {G:(DE-HGF)POF3-113},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000562044100001},
      doi          = {10.1016/j.fuel.2020.118663},
      url          = {https://juser.fz-juelich.de/record/885651},
}