Preparation of high refractive index La₂O₃-TiO₂ glass by aerodynamic levitation technique and effects of Bi₂O₃ substitution on its thermal and optical properties

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• 作者：Heng Xiang ; Lu Guan ; Zhijian Peng ; Jianqiang Li
• 关键词：La2O3&ndash ; TiO2 glass ; Bi2O3 substitution ; Aerodynamic levitation ; Thermal stability ; Optical properties
• 刊名：Ceramics International
• 出版年：April, 2014
• 年：2014
• 卷：40
• 期：3
• 页码：4985-4988
• 全文大小：513 K

文摘

La₄Ti₉O₂₄ and Bi₂O₃-substituted La₂O₃-TiO₂ glasses were prepared by aerodynamic levitation technique. The effect of Bi₂O₃ substitution on the thermal stability, refractive index and transmittance spectrum of the as-prepared samples were investigated. After Bi₂O₃ substitution, the stability of La₂O₃-TiO₂-Bi₂O₃ glass decreased, but the Abbe number increased with glass refractive indices above 2.2 in visible region. The high refractive index can be attributed to the large oxygen packing densities and electronic polarizabilities of oxygen ions in the glasses.