Transparent colorless glasses in the ternary BaO–TiO2–B2O3 system were fabricated via conventional melt-quenching technique. The glasses with certain molar concentrations of BaO and TiO2 on heat treatment at appropriate temperatures yielded nanocrystalline phase of TiO2 associated with the crystallite size in the 5–15 nm range. Nanocrystallized glasses exhibited high refractive index (n = 2.15) measured at λ = 543 nm. These glasses were found to be hydrophobic in nature associated with the contact angle of 90o. These high-index glass nanocrystal composites would be of potential interest for optical device applications.
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