Abstract
Growth conditions of stoichiometric or near-stoichiometric lithium niobate (sLN) from K 2O containing fluxes have been studied by investigating phase equilibria in the ternary system Li 2O–K 2O–Nb 2O 5. The crystallization area of LiNbO 3 was confirmed by growth experiments on the g1 (LiNbO 3–K 2O), g2 (LiNbO 3–ternary eutectic liquid ( E t: 45.0 ± 1.5 mol% Nb 2O 5, 26.0 ± 1.5 mol% K 2O and 29.0 ± 1.5 mol% Li 2O)) and g3 (LiNbO 3–KNbO 3) joins. The yield and the composition of LiNbO 3 single crystals were tested for a wide range of starting compositions. From these experiments, the starting compositions leading to stoichiometric lithium niobate have been determined.
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