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@ARTICLE{Sergeev:885652,
author = {Sergeev, D. and Yazhenskikh, E. and Haseli, P. and Liu, M.
and Ziegner, M. and Bruno, F. and Müller, Michael},
title = {{E}xperimental study of thermodynamic properties and phase
equilibria in {N}a2{CO}3–{K}2{CO}3 system},
journal = {Calphad},
volume = {71},
issn = {0364-5916},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Science},
reportid = {FZJ-2020-03983},
pages = {101992 -},
year = {2020},
abstract = {Sodium and potassium carbonates and their mixtures are
important for different applications, e.g. for latent
thermal energy storage, die-casting processes and molten
carbonate fuel cells. In this work the phase diagram and
thermodynamic properties of Na2CO3–K2CO3 system were
studied by differential thermal analysis, differential
scanning calorimetry and high temperature X-ray diffraction.
Three carbonate mixtures (56, 25 and 75 $mol\%$ of Na2CO3)
have solid-solid transition in a wide temperature range
between 648 K and 823 K. The high temperature XRD analysis
has shown that this transition is a continuous process of
changing of the unit cell volume without structural changing
of the hexagonal lattice. This phenomenon has also been
observed on the measured heat capacity curves. The obtained
experimental results were compared with calculations
performed using the previous thermodynamic datasets. The
comparison of these results shows that further
thermochemical assessment of this system needs to be
performed to achieve better agreement with the available
experimental data.},
cin = {IEK-2 / PGI-9},
ddc = {540},
cid = {I:(DE-Juel1)IEK-2-20101013 / I:(DE-Juel1)PGI-9-20110106},
pnm = {113 - Methods and Concepts for Material Development
(POF3-113)},
pid = {G:(DE-HGF)POF3-113},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000589922300009},
doi = {10.1016/j.calphad.2020.101992},
url = {https://juser.fz-juelich.de/record/885652},
}