Structure and thermal relaxation of network units and crystallization of lithium silicate based glasses doped with oxides of Al and B
authors Gaddam, A; Fernandes, HR; Doumert, B; Montagne, L; Ferreira, JMF
nationality International
journal PHYSICAL CHEMISTRY CHEMICAL PHYSICS
keywords SOLID-STATE NMR; HIGH-RESOLUTION AL-27; BOROSILICATE GLASSES; MAS-NMR; INORGANIC GLASSES; BORATE GLASSES; ALUMINOSILICATE GLASSES; RAMAN-SPECTROSCOPY; PHOSPHATE-GLASSES; LI2O-SIO2 SYSTEM
abstract The current study reports on the relaxation behaviour of lithium silicate based glasses as probed by NMR spectroscopy. A total of four glass compositions were studied with the parent composition being 28Li(2)O-72SiO(2), and added dopants of Al and B. All the compositions showed significant differences in the NMR spectra of both annealed and non-annealed glasses demonstrating the structural relaxation behaviour. We extended our binary statistical mechanical model to these complex compositions to study the relaxation behaviour. By the combined use of the extended statistical mechanical model and broken ergodicity, we shed light on the mechanism of structural relaxation as understood by NMR spectroscopy. We studied the crystallization behaviour of the glasses and reported on the variations of the residual glass composition changes in the crystallization fraction.
publisher ROYAL SOC CHEMISTRY
issn 1463-9076
year published 2017
volume 19
issue 38
beginning page 26034
ending page 26046
digital object identifier (doi) 10.1039/c7cp01690e
web of science category Chemistry, Physical; Physics, Atomic, Molecular & Chemical
subject category Chemistry; Physics
unique article identifier WOS:000412275200023
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journal impact factor 3.906
5 year journal impact factor 4.224
category normalized journal impact factor percentile 73.037
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