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Thermal stability and crystallization behavior of TiO2 doped ZBLAN glasses

ZBLAN glasses with the composition (in mol%) of (100−x)(53 ZrF4+19 BaF2+5LaF3+3AlF3+20NaF)+xTiO2 (x=0, 1.0 and 2.0mol%) were prepared using a conventional melting technique in dry nitrogen atmosphere. The thermal stability, glass-forming ability, and crystallization kinetics of the ZBLAN system as a...

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Bibliographic Details
Published in:Journal of non-crystalline solids 2011-07, Vol.357 (15), p.2907-2910
Main Authors: Santos, F.A., Delben, J.R.J., Delben, A.A.S.T., Andrade, L.H.C., Lima, S.M.
Format: Article
Language:English
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Summary:ZBLAN glasses with the composition (in mol%) of (100−x)(53 ZrF4+19 BaF2+5LaF3+3AlF3+20NaF)+xTiO2 (x=0, 1.0 and 2.0mol%) were prepared using a conventional melting technique in dry nitrogen atmosphere. The thermal stability, glass-forming ability, and crystallization kinetics of the ZBLAN system as a function of the TiO2 concentrations were investigated by Differential Scanning Calorimetry (DSC). Also, the crystalline phases were determined by X-ray Diffraction (XRD). Our study indicates that adding TiO2 in a fluoride system improves the thermal parameters of the glass, which is interesting for applications as optical fiber. ► TiO2 was incorporated in fluoride ZBLAN glass under dry nitrogen atmosphere. ► Glass thermal stability and Tg increase for high content of TiO2. ► The 2.0 mol% of TiO2-doped ZBLAN glass exhibits greatest glass-forming ability.
ISSN:0022-3093
1873-4812
DOI:10.1016/j.jnoncrysol.2011.03.032