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@INPROCEEDINGS{Gonde:908762,
author = {Gonde, Shivani and Yazhenskikh, Elena and Müller, Michael},
title = {{T}hermodynamic modelling of {NASICON} sub-system
{Z}r{O}2-{S}i{O}2-{P}2{O}5},
reportid = {FZJ-2022-02818},
year = {2022},
abstract = {Solid state electrolytes are the key for improving the
safety and practicability of batteries. NASICON (Na Super
Ionic Conductor) is proposed as replacement for β″-Al2O3,
as it has excellent structural strength and conductivity due
to its structure wherein Na migrates in 3D voids providing
ionic conductivity of 0.2 S·cm-1 (300 °C). Processing
temperature is relatively low (~700 °C), high Na abundance
makes it cheaper than Li-ion batteries.The NASICON phase
with formula Na1+xZr2SixP3-xO12 [0≤x≤3] is part of the
complex Na2O-SiO2-P2O5-ZrO2 system which is found to be
conductive. For successful material design, thermodynamic
properties (phase equilibria, heat capacity, stability,
etc.) for all sub¬systems must be known, and for prediction
of properties, a reliable and consistent database is
cardinal. To achieve this, a thermodynamic database of the
quaternary oxide system including the NASICON phase is being
developed using CALPHAD method.As part of this development,
the binary systems ZrO2-P2O5 and ZrO2-SiO2 were studied
which are later employed to envision the ternary
ZrO2-SiO2-P2O5 system. All the available data from
literature was critically analyzed and employed for
modelling. Modified associate species model was used to
describe the liquid phase. The phase equilibria predicted by
the new datasets are in excellent agreement with the
experimental data. Preliminary calculation of the ternary
system was performed by extrapolation of the binaries, and
the subsolidus equilibria matches to the experimental data.},
month = {May},
date = {2022-05-22},
organization = {CALPHAD XLIX, Stockholm (Sweden), 22
May 2022 - 27 May 2022},
subtyp = {After Call},
cin = {IEK-2},
cid = {I:(DE-Juel1)IEK-2-20101013},
pnm = {1223 - Batteries in Application (POF4-122)},
pid = {G:(DE-HGF)POF4-1223},
typ = {PUB:(DE-HGF)6},
url = {https://juser.fz-juelich.de/record/908762},
}