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@PHDTHESIS{Qi:989675,
      author       = {Qi, Jia},
      othercontributors = {Spatschek, Robert and Müller, Michael and Schneider,
                          Jochen M.},
      title        = {{T}hermodynamics of salt system: ${L}i^+$, ${K}^+$,
                      ${N}a^+$ // ${C}l^-$, ${CO}_3$ $^{2-}$.},
      school       = {Rheinisch-Westfälische Technische Hochschule Aachen},
      type         = {Dissertation},
      address      = {Aachen},
      publisher    = {RWTH Aachen University},
      reportid     = {RWTH-2024-06931},
      pages        = {1 Online-Ressource : Illustrationen},
      year         = {2024},
      note         = {Veröffentlicht auf dem Publikationsserver der RWTH Aachen
                      University; Dissertation, Rheinisch-Westfälische Technische
                      Hochschule Aachen, 2024},
      abstract     = {In this work, a new thermodynamic database of the Li+, Na+,
                      K+//Cl-, CO32- system was generated using the Calphad method
                      with FactSage. After collecting and analyzing the available
                      thermodynamic data in the literature, experiments were
                      designed to improve the comprehensiveness of the new
                      database. Differential Thermal Analysis (DTA) and high
                      temperature X-ray diffraction (HTXRD) were used to determine
                      the phase transition temperatures. Different types of
                      Differential Scanning Calorimetry (DSC) were used to
                      investigate the heat capacity of pure salts and intermediate
                      compounds. The controversial solid-solid phase transition of
                      Li2CO3 was proved to be caused by impurities. The accuracy
                      of the heat capacity of Li2CO3, LiKCO3 was improved, the
                      heat capacity of LiNaCO3 was measured for the first time.
                      The eutectic temperature of the K2CO3-KCl system was
                      measured, the solid solubility in the K2CO3-Li2CO3 system
                      based on K2CO3 was checked. The phase diagram of the
                      subsystem Li2CO3-Na2CO3 was further completed, three solid
                      solution phases based on the three solid modifications of
                      pure Na2CO3 were determined. For the reciprocal systems Li+,
                      K+//Cl-, CO32- and Li+, Na+//Cl-, CO32-, phase diagrams of
                      diagonal systems Li2CO3-K2Cl2, K2CO3-Li2Cl2, Li2Cl2-Na2CO3
                      and Li2CO3-Na2Cl2 were measured. The Gibbs energy data of
                      stoichiometric compounds (Li2CO3, LiKCO3 and LiNaCO3) and
                      the Gibbs energy functions of the solutions (liquid and
                      solid solutions) of the mentioned systems were reassessed
                      according to the literature and own experimental data for
                      the new database. Mainly based on the literature data, the
                      Gibbs energy of pure salt LiCl, the Gibbs energy of the
                      liquid phase of binary LiCl-NaCl, LiCl-KCl, LiCl-Li2CO3,
                      KCl-K2CO3, NaCl-Na2CO3 systems and the reciprocal system
                      Na+, K+//Cl-, CO32- and the ternary systems Li+, K+,
                      Na+//Cl- and Li+, K+, Na+//CO32- were reassessed. A new
                      database was developed, which can calculate and predict the
                      thermodynamic properties of the whole system more precisely
                      and reliably.},
      cin          = {525820 / 520000},
      ddc          = {620},
      cid          = {$I:(DE-82)525820_20160614$ / $I:(DE-82)520000_20140620$},
      pnm          = {PCM-Screening: Evaluierung eutektischer Gemische f. d.
                      Einsatz als PCM: thermodynamische Modellierung und
                      experimentelle Methoden. Teilvorhaben: Thermochemie
                      wasserfreier Salzsysteme für PCM (03ET1441D) /
                      Verbundvorhaben: PCM-Screening-2 - Evaluierung von
                      Salzsystemen für den Einsatz als PCM: thermodynamische
                      Modellierung und experimentelle Methoden - 2; Teilvorhaben:
                      Thermochemie wasserfreier Salzsysteme für PCM (01GW0623)},
      pid          = {G:(BMWi)03ET1441D / G:(BMWK)01GW0623},
      typ          = {PUB:(DE-HGF)11},
      doi          = {10.18154/RWTH-2024-06931},
      url          = {https://publications.rwth-aachen.de/record/989675},
}