Abstract
La₂O₃-TiO₂-SiO₂ glass, a type that could not obtained so far by the conventional melting method, was prepared successfully using a sol-gel process. Glass derived with the sol-gel process has compositions of 5La₂O₃-5TiO₂-90SiO₂, 5La₂O₃-10TiO₂-85SiO₂, and 5La₂O₃-20TiO₂-75SiO₂. The UV-visible absorption edge of all glass compositions was below 400 ㎚. The measured density is in the range of 2.55-2.89, and was nearly identical to the calculated density and the refractive index of the glasses derived from the sol-gel ranges from 1.545 to 1.645. The molar additive coefficient of TiO₂ measured in this ternary system is lower than the calculated value, while the value of La₂O₃ is higher.
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