【摘要】 <正> 一、引言 三硼酸锂晶体（LiB₃O₅,简称LBO）属正交晶系,空间群为P2₁cn,晶胞参数a=5、141（6）（?）,b=7.378（4）（?）,c=8.446（3）（?）,z=4,密度为2.48g/cm³,Moh′S硬度约为6。它是我所继发现β-BaB₂O₄晶体（BBO）之后,又首先发现的一种新型非线性光学更多还原

【Abstract】 The plate-shape lithium triborate single crystals with a dimension of 38×24×4 mm have been grown by the flux seeding method, using a self-flux B₂O₃ of composition LiB₃O₅:B₂O₃=2:1 （mol） at a constant temperature for a long time and then cooled very slowly. Though the self-flux has the advantage of avoiding contamination to the crystal, the viscosity of the solution is so high that it is very difficult to increase the growth rate for large crystals. Therefore, efforts have been achieved in this respect. Finally, a large crystal up to 37×25×13 mm of superior quality has been grown using this new flux.更多还原