METHOD OF GROWING BINARY CESIUM-LITHIUM BORATE MONOCRYSTAL Russian patent published in 1998 - IPC

FIELD: crystal growing. SUBSTANCE: method relates to producing nonlinear-optical monocrystal of binary cesium-lithium borate from solution-melt to crystal seeding by the melt point decrease. Composition of solution-melt is defined by the range of phase diagram ABCDE of system at the following point coordinates, mole parts: A: Li₂O is 0.15; Cs₂O is 0.15; B₂O₃ is 0.70; MoO₃ is 0; B: Li₂O is 0.17; Cs₂O is 0.17; B₂O₃ is 0.60; MoO₃ is 0.06; C: Li₂O is 0.16; Cs₂O is 0.16; B₂O₃ is 0.54; MoO₃ is 0.14; D: Li₂O is 0.13; Cs₂O is 0.13; B₂O₃ is 0.60; MoO₃ is 0.14; E: Lo₂O is 0.10; Cs₂O is 0.10; B₂O₃ is 0.80; MoO₃ is 0. Method involves the use of crystal seeding oriented at direction (011) and melt point is decreased from 810-840 C to 770-800 C at the rate 1-2 C/24 h. The use of solvent MoO₃ of low viscosity and growth carrying out at direction (011) provide possibility to obtain large CLBO monocrystals of size up to 55 x 50 x 17 mm³. Crystals exhibit high indices of optical quality that ensures to make optical members of size up to 10 x 10 x 15 mm³. EFFECT: improved method of crystal growing. 2 dwg