Abstract
Transparent tellurite glasses containing 5–10 μm diameter LiNbO3 crystals (3–7 wt%) have been successfully prepared using an incorporation method in which LiNbO3 crystals are directly dispersed into the 80TeO2-15Li2O-5Nb2O5 glass. The dissolution behaviour of the LiNbO3 crystals greatly depends on the Li2O: Nb2O5 ratio in the matrix glasses. In the 80TeO2-10Li2O-10Nb2O5 matrix glass, the crystals remaining after incorporation have the composition LiNb3O8. A small difference in the refractive indices, n, between the TeO2-based glasses (n=2.07) and the incorporated LiNbO3 crystals (n=2.296) is a significant reason for the transparency. It is feasible to prepare the highly transparent TeO2-based glasses containing a large amount of LiNbO3 crystals by controlling the incorporation process.
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