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Please use this identifier to cite or link to this item: http://repositorio.ufba.br/ri/handle/ufba/601

Title: Correlation of network structure with devitrification mechanism in lithium and sodium diborate glasses
Authors: Chen, Banghao
Zwanziger, Ulrike Werner
Zwanziger, Joseph
Nascimento, Marcio Luis Ferreira
Ghussn, Luciana
Zanotto, Edgar Dutra
Keywords: Vidro;NMR;Cristalização;Crescimento de Cristais
Issue Date: 1-Jan-2010
Abstract: The intermediate-range structure of the network former in lithium and sodium diborate was studied using nuclear magnetic resonance spectroscopy. Specifically, 11B{10B} rotational-echo double resonance experiments were employed to determine the distribution of dipole couplings between these isotopes and in this way determine whether the intermediate range order of the borate network was the same in the glasses as in the crystal forms of these compounds. It was found that in the lithium diborate case the networks are in fact similar between glass and crystal, while in sodium diborate they differ substantially. Because lithium diborate shows homogeneous nucleation and growth on the laboratory time scale while sodium diborate does not, it was concluded that structural similarity between glass and crystal of the glass former correlates strongly with nucleation mechanism.
URI: http://www.repositorio.ufba.br/ri/handle/ufba/601
ISSN: 00223093
Appears in Collections:Artigos Publicados em Periódicos (PEI)

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