The structural role of lanthanum oxide in silicate glasses
authors Gaddam, A; Fernandes, HR; Tulyaganov, DU; Ferreira, JMF
nationality International
journal JOURNAL OF NON-CRYSTALLINE SOLIDS
author keywords Glass; Lithium silicate; Liquid-liquid phase segregation; Lanthanum oxide; La-clusters
keywords LITHIUM DISILICATE GLASS; MOLECULAR-DYNAMICS SIMULATION; NUCLEAR-MAGNETIC-RESONANCE; LA2O3-NA2O-SIO2 GLASSES; CRYSTALLIZATION; SODIUM; MELTS; NMR; MICROSTRUCTURE; SPECTROSCOPY
abstract The alleged formation of La-clusters in silicate glasses has received an overall consensus. However, recent and the current experimental results do not support this hypothesis for the structural role of La2O3 in glasses. Therefore, here we propose a new model for the assignment of the peaks in NMR spectra. All the experimental results here reported could be consistently explained by ascribing to La2O3 a network modifier role. Further, the proposed model could also explain the network modifier role of La2O3 in silicate glass compositions reported in literature where it was originally ascribed to form La-clusters. The La2O3 mitigated the LLPS due to increased entropy from the increasing number of different types of Q(n) structural units.
publisher ELSEVIER SCIENCE BV
issn 0022-3093
year published 2019
volume 505
beginning page 18
ending page 27
digital object identifier (doi) 10.1016/j.jnoncrysol.2018.10.023
web of science category Materials Science, Ceramics; Materials Science, Multidisciplinary
subject category Materials Science
unique article identifier WOS:000459643000003
  ciceco authors
  impact metrics
journal analysis (jcr 2017):
journal impact factor 2.488
5 year journal impact factor 2.202
category normalized journal impact factor percentile 74.308
dimensions (citation analysis):
altmetrics (social interaction):



 


Sponsors

1suponsers_list_ciceco.jpg