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Issue 38, 2017
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Structure and thermal relaxation of network units and crystallization of lithium silicate based glasses doped with oxides of Al and B

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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 28Li2O–72SiO2, 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.

Graphical abstract: Structure and thermal relaxation of network units and crystallization of lithium silicate based glasses doped with oxides of Al and B

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Publication details

The article was received on 16 Mar 2017, accepted on 08 Sep 2017 and first published on 08 Sep 2017


Article type: Paper
DOI: 10.1039/C7CP01690E
Citation: Phys. Chem. Chem. Phys., 2017,19, 26034-26046
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    Structure and thermal relaxation of network units and crystallization of lithium silicate based glasses doped with oxides of Al and B

    A. Gaddam, H. R. Fernandes, B. Doumert, L. Montagne and J. M. F. Ferreira, Phys. Chem. Chem. Phys., 2017, 19, 26034
    DOI: 10.1039/C7CP01690E

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