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@ARTICLE{Brachhold:904308,
author = {Brachhold, Nora and König, Anna S. and Brendler, Erica and
Aneziris, Christos},
title = {{I}nvestigation of the synthesis and the alkali corrosion
of potassium aluminosilicates by {XRD} and {NMR} (29{S}i,
27{A}l)},
journal = {Ceramics international},
volume = {47},
number = {23},
issn = {0272-8842},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Science},
reportid = {FZJ-2021-05878},
pages = {33596 - 33605},
year = {2021},
abstract = {Alkali aluminosilicates are potential materials for high
temperature applications under alkali load. This study
investigated the corrosion behaviour of potassium
aluminosilicates of the nominal compositions of KAlSi2O6 and
KAlSiO4 synthesized at different temperatures and dwell
times and exposed to alkali load at 1100 °C. For
understanding the corrosion behaviour depending on the
synthesizing parameters, the produced materials and corroded
samples were investigated by XRD and NMR spectroscopy (29Si,
27Al). The combination of both analytical techniques showed
that characteristics of the synthesized materials on a
structural level played an important role for the corrosion
behaviour. It was shown that amorphous and disordered
components in the samples occurred which were not registered
by XRD. The application of 29Si and 27Al NMR spectroscopy
yielded that materials having already after synthesis a
structural arrangement similar to the equilibrium target
phase of the batch showed a high structural stability under
alkali load and gave positive results in the applied
corrosion test. Materials with large structural
rearrangements during alkali load exhibited volume changes
and therefore failed the corrosion test. Based on these
observations it should therefore be possible to design
materials with high chemical and mechanical stability
suitable as furnace linings and to evaluate end-of-life
aluminosilicates for an application as alkali corrosion
resistant recyclates.},
cin = {IBI-7},
ddc = {670},
cid = {I:(DE-Juel1)IBI-7-20200312},
pnm = {5241 - Molecular Information Processing in Cellular Systems
(POF4-524)},
pid = {G:(DE-HGF)POF4-5241},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000708539200003},
doi = {10.1016/j.ceramint.2021.08.269},
url = {https://juser.fz-juelich.de/record/904308},
}