ZrO 2 addition in soda-lime aluminoborosilicate glasses containing rare earths: Impact on the network structure

Abstract : The influence of increasing ZrO 2 content on the structural features of a rare earths (RE ¼ Nd, La) bearing soda-lime aluminoborosilicate glass was investigated through a multi-spectroscopic approach (Raman, Zr-EXAFS, 29 Si, 11 B, 27 Al and 23 Na MAS NMR). Particular attention was paid to the modifications occurring in the glassy network and on the distribution of Na þ and Ca 2þ ions. Zr 4þ ions were shown to be located in (ZrO 6) 2À sites, connected to the silicate network, and preferentially charge compensated by Na þ ions. A favorable competition of Zr 4þ ions against RE 3þ ions and (BO 4) À entities for charge compensators was observed, but no effect was detected on the environment of (AlO 4) À entities. This competition resulted in a modification of the RE 3þ ions environment with the ZrO 2 content that may affect their solubility in the glassy network.
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https://hal-cea.archives-ouvertes.fr/cea-01513511
Contributeur : Serge Palacin <>
Soumis le : mardi 25 avril 2017 - 11:02:33
Dernière modification le : jeudi 11 janvier 2018 - 06:21:41

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Arnaud Quintas, Daniel Caurant, Odile Majérus, Pascal Loiseau, Thibault Charpentier, et al.. ZrO 2 addition in soda-lime aluminoborosilicate glasses containing rare earths: Impact on the network structure. Journal of Alloys and Compounds, Elsevier, 2017, 714, pp.47 - 62. 〈http://www.sciencedirect.com/science/article/pii/S0925838817313816〉. 〈10.1016/j.jallcom.2017.04.182〉. 〈cea-01513511〉

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