Effect of Structure on Refractive Index for SiO2-B2O3-Ta2O5-ZrO2-Na2O System Glass

Xiao Dian Xu; Yan Hang Wang; Cheng Kui Zu; Peng Zhou

doi:10.4028/www.scientific.net/KEM.727.265

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Effect of Structure on Refractive Index for SiO₂-B₂O₃-Ta₂O₅-ZrO₂-Na₂O System Glass

Abstract:

The relationship between structure and refractive index for SiO₂-B₂O₃- Ta₂O₅-ZrO₂-Na₂O system glasses was investigated via Raman spectrum and V-block technology. The results showed that refractive index of the borosilicate glasses is mainly influenced by network structure such as planar [BO₃] triangle, [BO₄] tetrahedron and [SiO₄] tetrahedron. Refractive index decreases from 1.629 to 1.616 when B₂O₃ content increases from 15 mol% to 50 mol%. Na₂O component has a strong preference to provide non-bridging oxygen (NBO) atoms, which not only promotes the conversion of [BO₃] to [BO₄] unit but also depolymerizes the network structure. The refractive index has the highest value, =1.6264, when Na₂O content reaches to 28 mol%. Both ZrO₂ and Ta₂O₅ can promote structure formation of borosilicate glasses and make higher connection degree. However, the refractive index increasing with Ta₂O₅ addition is quicker than that with ZrO₂addition.

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Key Engineering Materials (Volume 727)

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265-271

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https://doi.org/10.4028/www.scientific.net/KEM.727.265

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Online since:

January 2017

Authors:

Xiao Dian Xu*, Yan Hang Wang, Cheng Kui Zu, Peng Zhou

Keywords:

Borosilicate Glass, Raman Spectroscopy, Refractive Index, Structure

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